SAN KBs

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Mar 26, 2025
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SAN KBs

Featured

SAN Configuration and Admin
Guides for configuring and administering a SAN in a NetApp environment.

FCP Lif down
Guide to troubleshooting FCP lifs that are Admin up or operationally down.

Data to collect for a SAN RCA
This KB details the information that might be needed for NetApp to perform an RCA.

Frequent WQE 0x16 errors
KB covering how to resolve 0x16 errors seen in EMS logs .

Freqent fcp.io errors with status 0x1d
KB covering how to resolve frequent 0x1d errors in EMS.

Brocade: SFP or cable Diagnoses
How to determine whether the SFP or Cable is faulty on a Brocade switch?

Other Resources

Article directory

#
- "IO operation error" reported on host with FC LUN
- "No suitable storage can be found" error seen when creating LUN from GUI
- "Path redundancy to storage device" and "End path evaluation" alerts on ESXi host
- "This array LUN is only available on one path" error on Flexarray due to mapping issue on the Eseries box
A
- A Linux node in HA Cluster was fenced after "A processor failed, forming new configuration" event
- Access to NetApp luns is lost while performing the Node unjoin activity due to reporting node list not being updated before performing the activity
- Active Non-Optimized (ANO) paths become invisible after a panic
- ActiveIQ Reports Metrocluster IP Not Supported on NVMe/FC
- Adapter timeouts causing lun disconnects
- After a space related outage, VMFS Datastore shows Error, Unknown
- After cluster setup can not see FCP adapter ports
- After FLI migration, mutiple luns went offline
- After NDU no iSCSI Sessions can be established on new Interfaces
- After ONTAP Cluster expansion LUN does not have correct mapping
- After ONTAP Upgrade Alert or Risk shows for Downed FC Interface in ONTAP System Manger
- After ONTAP upgrade new iSCSI LUNs not accessible from certain controllers
- After swapping out FC cards in nodes FC not working
- After volume move and node unjoin performed in ONTAP cluster LUNs not accessible
- After writing data to the LUN, ONTAP reports 0 percent volume usage
- AIX host hung after unnegotiated takeover
- AIX host initiators not logged in to storage cluster
- AIX Host is not logged into target
- AIX host loses connectivity to LUNs during takeover and giveback
- AIX loses connectivity to storage and does not log in again
- Alert ARRAY LUN CONNECTED USING ONLY ONE PATH
- Alerts due to for ICMP reported when LIF is not hosted on home port
- All Paths Down due to LIFs manually offlined
- All paths for LUN show Active I/O for VMware hosts
- All traffic for LUNs on both nodes only going through one node
- ANDU Ontap upgrade paused on node due to out of sync test SMBC relationships on source cluster
- Applications crash and won't run on ONTAP 9.7 LUNs
- Are any actions required on the ONTAP side when replacing a NIC card on the ESXi side
- Are there any known bugs causing outages during ONTAP upgrade 9.10.1P7?
- Are VLANs necessary for multipathing?
- ASA Has CIF's Configuration for Cluster Site Discovery Mode
- Assigning disk ownership in V-series fails with disk reservation errors
- Asymmetric Logical Unit Access (ALUA) support on NetApp Storage - Frequently Asked Questions
- AUTO-ARCHIVED: Is there any effect when changing the inbound/outbound user during the iSCSI connection?
- Available capacity of the ESXi datastore does not increase even if the UNMAP command is successfully executed on the mapped LUN
B
- Breaking FLI relationship gives error "BCOMKA internal error: LUN import not owned by this node"
- Brocade switch is not coming up after a power outage
- Brocade switch port offline and in “No light” state with Rx power showing as -inf
- Brocade Upgrade failed with error-"Non disruptive firmware download is not supported when firmware download with two versions apart"
C
- Can a FlexArray back-end LUN that is used in an aggregate be replaced with another?
- Can ALUA be disabled for an igroup on ONTAP 9?
- Can crash dump of the windows host be saved on SAN boot lun?
- Can FC initiators direct attach to ONTAP systems?
- Can I update the ONTAP SAN controller management IP address?
- Can I use 'smitty_update all' to update Netapp AIX HU?
- Can I use SnapMirror active sync (SM-as,SM-BC) to migrate windows LUN?
- Can iSCSI LIF and NAS LIF be on the same LIF
- Can iSCSI or FC data services be affected by adding NTP servers
- Can map a LUN to different clients simultaneously?
- Can multiple paths be reduced to a single path for a lun?
- Can NVME/TCP be used on existing setups prior to ONTAP 9.10.1
- Can Sanav call homes create NetApp Support Case?
- Can the FlexClone LUN and parent LUN have the same LUN serial number?
- Can UTA2 port be configured to a fixed speed when used as an initiator?
- Can we automate the Lun cloning activity every 24 hours?
- Can we backup Brocade switch configuration using Ansible?
- Can we choose Lun ID while creating namespace mapping with subsystem?
- Can we map a lun to multiple ESXi host in different cluster managed by same vCenter
- Can you directly attach Cisco FI for NetApp SAN storage access?
- Can you run CHAP authentication with FIPS mode enabled?
- Can you use active non-optimized paths for round robin in an ESXi environment?
- Cannot access boot LUN from UCS server
- Cannot connect more NVMe/TCP hosts
- Cannot create LUN: No suitable storage can be found for the specified requirements
- Cannot see FC LUN from the Host
- Cannot see NVMe over FC namespace from the
- Can't create iscsi lifs after improper cluster unjoin
- CHAP authentication failure after ONTAP upgrade on ESXi hosts
- CHAP authentication stopped working post upgrade on windows host
- Check jumbo frame connectivity over iSCSI lif
- CHECK MEDIUM ERROR received on AIX host end while accessing FC LUNs
- Cisco UCS host is unable to boot from FC LUN
- Cisco UCS shows initialize error 1 when attempting to create iSCSI sessions to ONTAP
- Citrix Hypervisors 8.2 LTSR are unable to add some LUNs
- Citrix outage during ONTAP upgrade
- Cloned volume do not show any data when mounted on host
- Clustered shared volume has entered a paused state
- CNA port does not come online with scsitarget.fcp.sfp.warning
- Commvault backups failing due to reservation conflicts
D
- Data ONTAP reports IO misalignment on properly aligned luns
- Datastore fail to show new capacity after lun resize on storage end
- Datastore went into unresponsive mode due to corruption on LUN
- Datastores not seen post migration
- Deleting one of LIFs having the same IP address interrupts iSCSI sessions on the other LIF
- Direct attached HPE VMWare iSCSI disconnects
- Direct ISCSI does not work and pings fail
- Disconnects logged on SAN application due to poor performance in ONTAP
- Disk disappears in Windows Server post reboot
- Disk errors reported due to Dead paths on AIX hosts
- Disk operation error observed on host end due to network glitch on the path from switch to target
- DISK REDUNDANCY FAILED WARNING due to port flaps in DWDM device
- Disks show as offline on rebooting Windows 2008 host after a Data ONTAP upgrade
- Do LUN serial numbers need to be unique in ONTAP?
- Do V-Series systems have multipath software?
- Does creating another SVM for SAN cause issues with the existing NAS connection?
- Does NVMe support WEAR(Write Exclusive All Registrants) capability for clustered VMDK
- Does ONTAP support both FC and iSCSI paths to the same LUN from the same windows server?
- Does 'service multipathd reload' command interrupt any previous multipathd working connections ?
- Does the modification of a service-policy service interrupt network traffic?
- During change of CIFS IP and route iSCSI disconnects
- During ONTAP upgrade, the ESXI VMs faced an ADP (All Paths Down) event
- Dynamic disks showing up as "foreign"
E
- EMS message during ONTAP upgrade - WQE processing failure of type SLI_ELS_REQ, command LOGOUT
- EMS message fcp.io.status AEN 0x8048 RECV_ERROR occurring
- EMS message 'fcp.io.status: Ext_Status 0x1d' frequently occurring
- EMS message 'fcp.io.status: Ext_Status 0x1d' occurring due to faulty host end SFP
- EMS message 'fcp.io.status: Ext_Status 0x5' frequently occurring
- EMS message 'fcp.io.status: state=5' frequently occurring
- EMS message 'fcp.io.status: state=7' frequently occurring
- EMS message 'fcp.io.status: state=8' frequently occurring
- EMS reports scsiblade.lun.ids.change:error
- Error - Abort Command issued from host
- Error "Test Disk X does not support SCSI-3 Persistent Reservations" displayed when running Microsoft cluster validation
- Error during FLI: This disk is in a failed state with the outage reason "failed". The Disk needs to be removed and replaced
- Error Loss of LUN path redundancy and possibly data access
- Error message: The following initiator groups have ALUA setting mismatch
- Error messages from Veeam spamming Audit Logs with - LUN is not currently offline
- Error while trying to convert initiator ports to target
- Error: 'Another LUN mapped at this number' displayed when attempting to set LUN ID in ONTAP
- Errors encountered during controller bootup : fci.config.missing
- ESXi 6.7 storage errors with ONTAP LUN and MT27500 ConnectX-3 network card
- ESXi datastores are unavailable after network switch migration
- ESXi heartbeat timed out error due to Insufficient space on NetApp volume
- ESXi host creates scsi 3 persistent reservation on LUN due to RHEL guest configuration
- ESXi host down with PSOD error and transient storage errors on host end
- ESXi host iSCSI datastore paths down due to duplicate server IP
- ESXI host rescan operations fails /timeouts
- ESXi hosts are down with IO error after ONTAP upgrade
- ESXi hosts drop connections to SAN storage due to latency
- ESXi hosts frequent disconnection from iSCSI Datastore
- ESXi hosts intermittently lose access to iSCSI datastores
- ESXi with iSCSI Boot LUN fails to boot
- Excessive port errors and FC connectivity issues
- Existing ISCSI LUNs are not visible on new Veeam proxy server
- Existing LUN not displaying expected number of paths on the host
F
- FabricPool AIX SAN host remediation
- FabricPool ESXi SAN host remediation
- FabricPool HP-UX SAN host remediation
- FabricPool Linux SAN host remediation
- FabricPool SAN Host Resolution Guide
- FabricPool Solaris SAN host remediation
- FabricPool Windows SAN host remediation
- Failed path detected on host after VM failover for direct-attached NetApp storage LUN
- Fails to change the LUN id with "This LUN ID is already in use" error
- FAQ - Windows dynamic disks on NetApp LUNs
- FC link not coming up on target ports
- FC adapter down due to fixed port speed mismatch
- FC adapter shows 'Link disconnected' due to the switch being disabled
- FC connection loss during ONTAP Upgrade
- FC Connectivity to Node Remains Down After It Was Out of CLAM Quorum
- FC initiator port offline due to faulty SFP
- FC initiator port resetting due to Device asyncd state stalled
- FC initiator port status showing OFFLINE (hard)
- FC initiator ports offline when connected to 8G switch
- FC LIF went down post Ontap upgrade
- FC LIFs are not negotiating at their optimal speeds
- FC link down with error Timeout while getting fabric information
- FC LUN not visible on ESXi host
- FC LUNs not reachable after ONTAP upgrade due to lifs unexpectedly moving during upgrade
- FC NPIV targets not appearing in fcp topology show
- FC target adapter link not connected
- Fcp adapter show command operation timed out for ports
- FCP datastore showing as not consumed in Vcenter
- FCP FCoE LIF reports operationally down with extended status FDISC error
- FCP initiator not logged in on VTIC
- FCP initiator show doesn't show all active sessions
- FCP LIF goes down when the controller is directly connected to the initiator
- FCP Lif operationally down with extended status as "LIF not initialized" post changing mode from CNA to FC
- FCP Network Interfaces down/down after ONTAP upgrade
- fcp ping fails with the ping status not-reachable
- FCP slowness and SRAM dumps during higher workload
- FCP SRAM DUMP and IO WQE failure with Ext_Status 0x16 caused by same host SID
- FCP target and path loss on several blades in a chassis
- fcp topology show and fcp adapter show command timeout in ONTAP
- FCP/FCoE LIF reports operationally down
- FCP/FCoE LIF reports operationally down due to Faulty switch SFP
- Few files missing on ISCSI lun mapped as drive to the windows host
- Fiber Channel (FC) SAN connectivity lost after controller replacement
- Fibre Channel dropout issue
- Files in LUN give error after SnapMirror break
- Firmwaredownload is not allowed because half duplex is configured
- FlexArray backend 3rd party storage panic causes aggregate and disk unknown
- FlexArray back-end LUNs show status Failed
- FlexArray node rebooted due to multidisk error
- Flexarry pre-upgrade check reports error "Data ONTAP requires that an array LUN be visible on only one target port for each initiator port"
- FLEXPOD FCOE RDM Paths on ESXi Hosts down
- FlexVol with a LUN is nearly full but the LUN size is much less than the size of the volume
- FLI (Foreign lun import) import is slow
- FLI stalled import progress multiple LUN's
- Format a new LUN with the error of "Formatting did not complete successfully"
- Free space consumed on MSSQL LUN with no obvious cause
- Frequent scsitarget.hwpfct and scsitarget.slifct errors reported in EMS logs for FCP adapter on Ontap end
G
- GUI displays partially connected status after filer panic
H
- HBA port encountered a device timeout on Disk device
- High IO waits and latency on VMs connected to NetApp FC LUN
- Host (3rd party OS) Troubleshooting Workflow
- Host cannot log into LIF due to iSCSI access list
- Host initiators didn't login backup to single FC port after upgrade due to faulty SFP
- Host Initiators not logged in to NetApp cluster using some of the paths
- Host initiators showing 'not logged in' after Cisco switch upgrade
- Host is not able to establish connection with storage as IQN is not added in the igroup
- Host lost iscsi sessions and reported APD due to network switch maintenance activity
- Host WWPN not logged in on Storage Controller
- Hosts being logged out by MDS Switch
- Hosts disconnect from LUNs after changes in fabric
- Host-side SCSI Timeouts when using iSCSI
- Host-side SCSI timeouts when using Microsoft iSCSI software initiator
- How can I see the mapping between the AIX hdisk and the NetApp LUN?
- How can we see the LIF mapping to each PATH to our filers on a windows server
- How do I check the HBA and link speed from a Solaris Host?
- How do lun reset and target reset commands affect SCSI-2 Reservations?
- How does a Snapshot of a LUN work?
- How is space utilization managed in Data ONTAP SAN environment?
- How many paths to a lun are supported in Windows?
- How Selective LUN Mapping (SLM) works
- How to change ONTAP SAN controller management IP address
- How to check ALUA AO path after moving the volume or LUN
- How to check device mapper multipathing and iSCSI initiators on Red Hat Update 3 and later
- How to check FCP error counters
- How to check host side space management for SCSI thin provisioned LUNs
- How to check MIB information necessary for measuring data traffic on FC ports using SNMPGET?
- How to check which NetApp FC ports connect to which switch ports
- How to clean up unused and expired License Keys
- How to collect data for an RCA of a SAN event that occurred in the past
- How to collect data for an RCA of an Oracle Database Crash
- How to configure duplicate WWPN event notification on switch?
- How to configure NVMe on Ubuntu?
- How to confirm MPIO settings for ESXi hosts
- How to Create a LUN in a WSFC Environment
- How to create aligned partitions in Linux for use with NetApp LUNs, VMDKs, VHDs and other virtual disk containers
- How to create SAN link alerts
- How to Delete a LUN Using System Manager or Command Line
- How to determine failed SCSI commands against LUNs on ESXi
- How to determine what data protocols are configured on Storage Virtual Machines (SVMs)
- How to enable FC-NVMe on Windows
- How to enable or disable SAN FCP Persistent ports feature on DATA ONTAP 9.8 ASA platform
- How to Establish iscsi Session to Storage on an Ubuntu Host
- How to find the serial number of a LUN in Windows using PowerShell
- How to frame a Performance case relating to SAN
- How to free-up space on FlexVol with LUNs?
- How to identify a device by its World Wide Name (WWN) or MAC address?
- How to identify controller iSCSI IQN in clustered Data ONTAP
- How to identify the iSCSI software initiator node name (IQN) from a host operating system
- How to identify unaligned IO on LUNs?
- How to improve VM throughput using Paravirtualized SCSI in VMWare?
- How to limit iSCSI initiator access to target portals
- How to manage multiple iSCSI sessions in Solaris 10/11 with Dynamic Discovery method
- How to manually attach a LUN over iSCSI to a single host
- How to match Linux disk WWID to LUN serial number?
- How to modify iSCSI target name on ONTAP?
- How to modify rw_timeout value on AIX 7.2 for NetApp MPIO disks
- How to modify the home port and/or home node of an existing clustered ONTAP logical interface serving a SAN/ block protocol
- How to move a LUN to a different cluster node
- How to move an iSCSI Storage Virtual Machine (SVM) or volumes
- How to perform an offline upgrade of backend array firmware for FlexArray
- How to reclaim space for thin provisioned LUNs using PowerShell for Windows
- How to reconfigure iSCSI with VLAN from no VLAN
- How to remove iSCSI target in a Windows Server
- How to rename a LUN in Clustered Data ONTAP 9.x
- How to rescan and recover LUN paths in a host after modifying SLM reporting nodes
- How to resolve fabric related connectivity issues
- How to restore deleted files from a snapshot when using a Windows LUN in ONTAP
- How to select disk type when creating a LUN using System Manager or CLI in ONTAP 9
- How to set configurations on AIX host for better performance of AIX iSCSI with ONTAP
- How to setup FCP in Data ONTAP 8.1 Cluster-Mode
- How to troubleshoot connectivity to backend disks in a Flexarray/V-series environment
- How to troubleshoot degraded connectivity from a host to a filer
- How to troubleshoot frontend SAN issues using the fcHosts 3 command (part of supportdata collection)
- How to troubleshoot when LUNs are reported missing on host end
- How to utilize and set up portsets in clustered DATA ONTAP using CLI
- How to validate name space UUID with ontap
- How to verify AIX fibre channel configurations with multipathing I/O (MPIO)
- How to verify HP-UX fibre channel configurations with multipathing I/O (MPIO)
- How to verify Linux fibre channel configurations with multipathing I/O (MPIO)
- How to verify SAN host configuration before an ONTAP upgrade
- How to verify SAN host initiator connection status in ONTAP
- How to verify storage is receiving SCSI unmap requests from a host
- HP Virtual connect module connected to host port going down repeatedly
- HUK 6.1 MPIO version mismatch after successful installation on AIX host
- HYPER-V cluster management console shows a warning: you must run chkdisk with scan mode on this volume
- Hyper-V cluster nodes down after cluster shared volume disconnected events
- Hyper-V cluster nodes see BSODs caused by ONTAP DSM at random
I
- I/O Timeouts when using Cluster Shared Volumes for Hyper-V
- igroups can not be deleted: Initiator group does not contain the initiator
- Impact of applying or changing port set
- In a FlexArray, how can the LUN ID on the backend storage be ascertained?
- Increase the LUN size failed: No space left on device
- Increased lun space not visible on RHEL host
- Increasing CRC errors on multiple Brocade switches' ports
- Initiator FC Ports not shown in GUI under FC Ports
- Initiator showing as logged in post decommission of the host
- Initiators exist in initiator show after removal from igroup
- Intermittent host reboot due to faulty server end sfp
- Intermittent loss of access to LUNs on host
- IO Error reported on ESXi due to faulty host end sfp
- IO Error reported on Solaris host due to datastore becoming "Write Protected"
- IO error(Event ID 136) observed on host end when volume metadata was reset
- IO/Checksum errors reported on Solaris filesystem hosted on NetApp LUN
- IOPS only seen on one node due to indirect iscsi traffic
- iPerf showing lower throughput
- IPSec not working over iSCSI from Windows 2019 server in CVO
- Is HUK installation for FC needed for AIX Host
- Is iSCSI connection continued without any problem even if iSCSI session is connected to only one node by ONTAP upgrade ?
- Is it necessary to install SnapCenter Plug-ins Package for Windows and Windows Host Utilities when setting up iSCSI connections in a multipath configuration
- Is it possible to connect multiple iSCSI clients at the same time?
- Is it possible to create multiple NVMe spaces on a single ONTAP SAN volume?
- Is it possible to map two standalone hosts to a single LUN?
- Is it possible to migrate the data without copying the disk attributes?
- Is it possible to remove the disks showing as 'failed' in sysconfig -a for a foreign LUN
- Is it possible to use a single container volume with more than one LUN inside?
- Is it recommended to have ISCSI and NFS configuration on same link
- Is NVME over ROCE supported with Ontap
- Is Oracle Solaris 10 (SunOS 5.10) and 11 (SunOS 5.11) supported with iSCSI?
- Is possible to use SQL volume read_only to prevents LUN offline due to space error
- Is Sanlun utility part of windows HUK?
- Is the LIF WWPN modified after X1135A FC Card swap slot
- is there a recommendation number of paths from the host to nodes in the cluster When using ONTAP with FC?
- Is there a tool similar to VMware's VAAI for use in an iSCSI-connected Hyper-V and WSFC environment?
- Is there any problem with setting the no_path_retry in /etc/multipath.conf to fail?
- iSCSI and NAS outage during update
- iSCSI and NFS Protocol see constant disconnects in a VMware environment on ONTAP 9
- iSCSI configuraiton change caused Windows disk offline
- ISCSI initiator not logged-in on partner node while using a direct connect
- iSCSI LIF operational status delay after network cable connection
- iSCSI lun lost access during ontap upgrade due to MPIO not installed
- iSCSI LUNs disconnect on AIX server during TO/GB, ONTAP Upgrade
- iSCSI LUNs disconnect on Windows server during TO/GB, ONTAP Upgrade
- iSCSI LUNs in a portset not visible after upgrade to 9.5
- iSCSI LUNs unavailable during ONTAP upgrade
- ISCSI Performance tests are slow
- ISCSI sessions are not re-established post ontap upgrade
- ISCSI sessions not getting established for new hosts
- iSCSI throughput only uses one LACP link on client during testing such as Oracle SLOB
- iSCSI timeouts Q&A
L
- Licensing information for NVMe protocol on ONTAP
- LIF operationally down and Link break event detected on FC target HBA due to faulty SFP on storage side
- LIF unreachable after being migrated to another node due to network misconfiguration
- Link break detected on Fibre Channel target connected to Brocade switch due to faulty storage end sfp
- Link break on FCoE: Firmware status code status1 0x10, status2 0x7, and status4 0x31
- Link Break on Multiple FC Target Adapters Due to Brocade Switch Reboot
- Linux ALUA handler is not enabled
- Linux does not mount filesystems automatically after reboot because .mount unit is masked
- Linux Host Recommendations for NVMe/FC protocol support with NetApp MetroCluster IP
- Linux VMs not acessible after ONTAP LUN move
- Login to iSCSI target xxx on xxx @ xxx failed on VCenter
- Long distance ISLs via 100G muxponder will not form trunk
- Loss of NFS and SAN access during Ontap Upgrade on MetroCluster
- Lost access to volume due to connectivity issues
- Lost access to volume events due to faulty inter-switch link
- Lost access to volume on ESXi host due to faulty HBA
- Low RX observed on NetApp FC target port and switch port due to faulty cable
- Lower than expected iSCSI throughput
- LUN automatically displays additional reporting nodes than the Owner and HA partner
- LUN cannot have more then 180 SCSI 3 Persistent Reservations
- LUN created with OS Type Windows_2008 shows windows as OS type when lun show is ran
- LUN creation from Openstack failing with error
- LUN folder permissions not synced across Linux clients
- Lun group rebuild command causes panic
- LUN has no state after SnapLock
- LUN in unknown state when imported from third party array
- LUN is not visible on storage end due to its deletion
- LUN mapping to igroup fails with error :No such initiator group exists
- LUN missing from Data ONTAP after LUN goes offline due to space constraint
- LUN not accessible due to REST API call
- LUN not seen at host due to misconfigured Peer Zone
- LUN not visible in ESXi when lun IDs are greater than 255
- Lun reset from Linux host when doing a lun resize
- LUN resize function not implemented for Solaris LUN
- LUN sector count mismatch between OS and NetApp using Ansible
- LUN size increased on storage side is not recognized by disk manager on host
- LUN unexpectedly out of space
- LUN went in to Read only(RO) state during ontap upgrade
- LUN within volume can not be created by FlexClone due to lack of space error
- LUN won't come online on Windows host end
- LUNs are not visible on host end due to conflict of zoning on UCS switches
- LUNS disappear after removing reporting nodes from SLM
- LUNs go APD in VMware but cannot be found on NetApp storage
- LUNs missing on HP UX Host with Error “Evpd inquiry page 83h/80h failed” generated on host end
- Luns not accessible with one Node down due to portset not being configured properly
- Luns not visible after ONTAP Upgrade
- Luns sharing same Lun ID resulting in error while trying to add initiator to igroup
M
- Map LUNs to a replicated Windows VM in the DR site
- MCC ONTAP 9.11 update FC LIF fails fabric login after switchback
- Microsoft Cluster shared resources offline in DR test
- Microsoft Exchange Server databases are read-only when mounted from a Snapshot Clone
- Misaligned LUNs reported for luns mapped to Windows host
- Modifying management LIFs disrupts database operations
- Monitoring software shows loss_of_sync of FCP adapter
- MPIO is changed after vol move
- MPIO path is changed after volume move
- MPIO Win License does not have a 28 character format for ONTAP
- Multi disk panic in FlexArray when the tape drive and library are zoned to the same storage initiator port
- Multi disk panic in FlexArray with third-party storage
- Multipathd going in to zombie state due to invalid parameter set
- Multiple new iSCSI sessions are seen with the same IQN but different initiator IPs
- Multiple ports flapped on Netapp nodes
N
- NetApp LUN shows more used space than Windows Server volume
- NetApp Storage device marked as flash instead of HDD in VMware vSphere
- network fcp topology show command times out
- New host WWPN not showing up
- New Hyper-V server MPIO sees too many iSCSI paths to luns
- New LUN clone not visible in Windows
- New LUNs created in ONTAP 9.8+ unable to be added to Oracle ASM diskgroup with previously created LUNs
- New ONTAP AFF poor performance during RMAN Oracle backups
- New/Exsiting LUN not visible on host due to SLM configuration
- New/Migrated LUN are not visible on host due to SLM/portset
- Newly added paths do not show up on host end post adding new nodes to the cluster
- Newly assigned LUN not visible with error: "The legacy I/O bus instance number exceeded the maximum allowed bus number limit of 256"
- Newly created luns not visible on the host end
- Newly created namespace is not visible on the host end due to nqn mismatch
- Newly created NVMe namespace not visible on the ESXi host as qlnativefc driver parameter for enabling NVMe/FC support is not set
- Newly created NVMe namespace not visible on the ESXi host as lpfc parameter disabled
- No disks attached to system after controller replacement in two node MetroCluster FlexArray solution
- No guidelines to setup FC LUNs with Openshift clusters
- Node stuck in initializing-vservers
- NTFS file system inconsistency on LUN
- NVMe LUNs are not visible on host side due to vNIC driver issue on RHEL host
- Nvme namespace size and volume size doesn't match
- NVMe namespaces are not visible to vmware hosts after hardware move
- NVME Subsystem Removal causes Disconect
- NVMe-oF port is down with adapter status startup
O
- One LUN displaying as multiple drives in Windows disk management
- On-prem host IQN is showing as not-logged-in on CVO end
- ONTAP and Windows SCSI unmap and space reclamation
- ONTAP can't show LUN information and replaced by "N/A"
- ONTAP error inconsistency between TCP metadata and socket send buffer
- ONTAP FC client can not access storage LUN
- ONTAP FC port is not working with CISCO
- ONTAP FC port shows low receive power (RX) value
- ONTAP FCP port down after troubleshooting
- ONTAP FlexArray error LUN is an access control LUN
- ONTAP FlexArray Multi Disk Panic: fatal disk error in RAID group with no parity disk
- ONTAP initiator port shows question mark ?
- ONTAP iSCSI LIF custom service not allowed while service policy applied
- ONTAP iSCSI LUNs not accessible after power outage
- ONTAP iSCSI SAN continuous interruptions
- ONTAP iSCSI SAN deployment IQN mismatch
- ONTAP iSCSI SAN unreliable ports with 10GB SFP MM SR
- ONTAP Low power on receive for FC SFP even after known good SFP was replaced
- ONTAP LUN has volume space error RHEL
- ONTAP LUN offline due to lack of space in the volume or aggregate
- ONTAP LUN Volume capacity free disk does not increase after deleted files with Linux
- ONTAP LUNs not accessible after power outage
- ONTAP namespace space reclamation on NVMe datastore does not work
- ONTAP SAN all FC ports going down with fcp.sram.dump
- ONTAP SAN encountered a space error with multiple LUN
- ONTAP SAN ESXi Not responding state after MCC switchover
- ONTAP SAN fabric connection errors
- ONTAP SAN FC port with 500 initiator logins LIF reports waiting for link and FC transport operation timed out
- ONTAP SAN FCoE LIF not initialized with Nexus 9000 and VPC
- ONTAP SAN foreign LUN import FLI of VMFS errors
- ONTAP SAN host path missing
- ONTAP SAN Input Output error with ISCSI OpenShift LUN
- ONTAP SAN IO interruptions by changing service-policy of the management interface
- ONTAP SAN IO misalignment with VMware LUN
- ONTAP SAN iSCSI connection errors on AIX IBM Power
- ONTAP SAN LIF failed fabric login during MCC switchover
- ONTAP SAN lost access to VMware datastore
- ONTAP SAN LUN with VMWare ESXi 6.7 RDM corruption
- ONTAP SAN Multipathing issue not all HBA logged in
- ONTAP SAN Oracle alignment reporting with Harvest Grafana
- ONTAP SAN outage during Cisco Nexus update
- ONTAP SAN Performance impact for one host with AEN 0x8048 RECV_ERROR
- ONTAP SAN SCSI aborts seen from ESXi hosts with Veeam
- ONTAP SAN STIO Errors on same port
- ONTAP SAN tape backup job errors with SCSI aborts
- ONTAP SAN Tape library FC Zone not working with new Controller
- ONTAP SAN unable to map FC LUN directly to virtual machine
- ONTAP SAN VMware ESXi all paths down
- ONTAP SAN VMware RDM Microsoft validation fails
- ONTAP SAN Windows boot from SAN failed after update
- ONTAP SAN with Commvault will not accept new FAS WWNN WWPN
- ONTAP SAN with failed faulty Linux multipath after ONTAP update
- ONTAP System Manager reports initiators not logged into one node after switchback
- ONTAP thin LUN with VMWare does not auto reclaim space
- ONTAP unable to PLOGI on Dell MX9116n switch
- Ontap upgrade stalled due to LIFs being down with waiting for link and LIF not initialized state
- ONTAP volume out of space with new LUN during data migration
- ONTAP WAFL Hung Panic may impact SAN protocol services
- Openshift POD reports failed path
- OpenStack loses access to storage during takeover
- Oracle ASM disk group reports "mismatch on 'Sector Size' with target disk group" while adding new disks from NetApp
- Oracle database failed over during giveback
- Oracle host loses connectivity during ONTAP failover
P
- Package NVMe_oF is not licensed in the cluster
- Page Fault Panic after running `fcp zone show`
- Partially connected igroup notification for Fiber Channel initiators
- Partially connected status on Fibre Channel initiators
- Partially connected status seen for igroups in system manager due to scanners not running in CLI
- Path failed errors reported on AIX host due to faulty target connected switch sfp
- Path id for Windows MPIO is no longer showing proper formatting when using ONTAP DSM
- Path issues reported on RHEL host for FC LUN
- Path redundancy degraded alerts on ESXi host due to faulty host sfp on switch
- Path redundancy degraded alerts receiving continuously on ESXi host side
- Path will disconnect and reconnect when an iSCSI LIF is renamed
- Periodic failed path with IO multipath errors in hypervisor
- Persistent port object fails to initialize for a new FCP LIF on a non ASA system
- Poor performance on hosts due to faulty switch SFP
- Provisioning luns via systemmanager fails with aggr model cache older than 24h
Q
- Qualys scanner reports iSCSI Target Authentication Disabled
- Quorum disk appears as "failed" in the MS failover Manager
R
- Read Only LUN not Updating automatically
- Remote OPS observed on LUNs when using Oracle ASM
- Repeated new ISCSI sessions when one already exists messages
- Repeated Windows Event Log ID 51 entries after LUN shrinking
- Restoring iSCSI LUN from snapshot restores DACL/SACL attached to filesystem in the LUN
- RHEL 7 system logs sees Error entry - invalid handle/queue for qla2xxx
- RHEL cluster failover "Warning! Received an indication that the LUN assignments on this target have changed"
- RHEL does not detect MetroCluster remote LUN
- RHEL Host cannot mount any iSCSI LUN
- RHEL host going into hung state during ONTAP upgrade
- RHEL host is unable to see it's provisioned NVMe namespace
- RHEL Host showing different lun size compared to the actual size of the lun on the storage end
- RTPG command expects the number of LIFs per Vserver to be below 700
S
- Safely remove a iSCSI datastore from a single host
- SAN Disk corruption for a new LUN at windows Host
- SAN host does not failover I/O to alternate paths when one or more paths are removed and an RSCN is not received
- SAN host loses LUN connection during volume move operation
- SAN services down after reboot of up node that had taken over partner for extended time
- san.initiator.login.missing events reported post Ontap upgrade
- SANnav No Data to Display Due to Telemetry Profile Registration Error
- SANnav SNMP performance data collection failed for switch
- SCSI operation code 0x85 logged as failed against LUNs in ESXi vmkernel.log
- Server is unable to SANboot from a NetApp lun
- Server retries IO due to faulty SAN switch ISL
- Several drives have failed simultaneously due to an SFP fault
- Single disk path on Flex array with Eseries storage
- Single path seen on ESXi host
- Single volume hosting multiple LUNs reporting high latency
- Slow backups due to high latency on LUNs
- Slow iSCSI throughput on ESX with Intel XL710 NICs
- SM-BC destination cluster LUNs not connected to Linux host
- Snapshot LUN from ONTAP shows as no consumed space in Vcenter
- Solaris has valid paths to storage but still loses access to LUN during takeover
- Solaris host rebooted due to host initiator not logged in to any of the LIFs
- Solaris host utilities does not display the LUN information
- Some clients are operating over a single path after the ONTAP upgrade
- Some of the FCP paths are unavailable
- Space discrepancies seen in thin provisioned volume containing single thick provisioned LUN
- Space is not reclaimed on LUN with ESXi vRDM
- Space not reclaimed on LUN with ReFS
- Space reclamation does not occur on Storage with Trident host
- SQL databases crash following NDU with no lun loss
- SQL volume reporting IO error (high latency) hosted on NetApp LUN
- SRAM DUMP with status:0x87800000, status1:0xa40c, status2:0x0 on Emulex HBA with ONTAP
- SRAM dumps causing intermittent disconnections on ESXi host
- SRB timeout errors seen on Host end for FC LUNs
- Stale entries of failed paths on AIX host
- STIO WQE failure events on NetApp end and disk operation error on AIX host reported due to faulty host end sfp
- Storage auto-reclamation does not occur
- Storage vMotion fails with an error "Disk size reported by storage (VASA provider) is inconsistent"
- Sudden latency and high disk utilization on all volumes from an aggregate
- Switch port faulty events reported on error logs
- Switch port in persistently Disabled state due to duplicate WWPN errors on Brocade switch
- Syslog certificate is added successfully but not listing with "seccertmgmt show" command
- System does not boot when adding NVMe/FC namespace to /etc/fstab
- System Manager displays partially connected status even initiators logged in
T
- Takeover possibility going to false state due to missing 3PAR disk on partner node
- Tape library is not visible via Emulex XE201 adapters
- Temporary error fcp.io.status
- Testing NVMe/TCP server has lost connection to NetApp MCC
- The "partially connected" warning status appears when connecting a LUN to a Windows Server
- The created LUN size is larger than the value on -size parameter of lun create command
- The FCP LUNs online but not accessible after the Cluster failover
- The Interoperability Matrix Tool does not show support for all ESXi build versions
- The LUN can not be deleted due to the error Read-only file system
- The SAN host can not find the new FC LIF path of the new join cluster node
- The 'sanlun lun' command returns 'segmentation fault' error
- The 'sanlun lun show -p' command reports stale paths
- The space is not reclaimed when lun space-allocation is enabled
- The used space in FlexArray is higher than third party storage
- There are different types of Fibre Channel ports, what are they and what type of port does the NetApp filer have?
- Thick LUN states space-error but is not full
- Thin LUN goes out of space and doesn't grow automatically
- Thinly Provisioned LUN is not reclaiming free space
- Tiered data using Azure File Sync not reclaiming space on NetApp LUN
- Total outage for ISCSI
- Trident provisioned LUN turns offline due to volume full and filesystem goes 'read-only'
- Troubleshooting Workflow: LUN offline/out of space
- Troubleshooting Workflow: RPC Timeout Workflow
- Tunable parameters in ONTAP 9.0 for reliably handling backend disruptions in FlexArray Virtualization environment
- Two different IP subnets on the same port experience connectivity issues
U
- UCS host is unable to see Boot LUN
- Unable to access LUNs after volume move
- Unable to add additional iSCSI paths
- Unable to add FCP LIF to portset after cluster network instability during ONTAP Headswap
- Unable to boot from SAN after installing host utilities on AIX server
- Unable to configure MPIO using the iSCSI Initiator
- Unable to create diskgroups with logical sector size of 512 bytes although Oracle ASM is configured to use logical sector size
- Unable to create FC LIF getting error as Invalid Field error
- Unable to create filesystem on XCP host
- Unable to create LUN after adding new disk shelf
- Unable to Create Lun in ONTAP System Manager due to Root Volume Offline
- Unable to create or update FCP LIFs
- Unable to create VMFS datastore on ESXi host
- Unable to delete LUN from CLI and GUI
- Unable to detect direct-attached FC tape devices using Qlogic 8324 HBA in loop mode
- Unable to enable "write caching" feature for LUN device on a Windows server
- Unable to map cloned LUN to Windows Failover Cluster
- Unable to migrate Array lun greater than 16 TB using FLI
- Unable to migrate ISCSI Lifs to another node because SLM is not configured
- Unable to modify automatic iSCSI LIF failover
- Unable to modify home port of iscsi lif due to iscsi service already active
- Unable to mount iSCSI datastore to ESXi hosts
- Unable to perform failover using zerto application
- Unable to ping ESXi hosts, no iscsi connectivity
- Unable to ping iscsi lifs
- Unable to recover all Flex Array disks after an outage of E-Series
- Unable to remove remote-reporting-nodes as LUN is not mapped to owner or partner node
- Unable to upgrade Cluster - unable to change oper status of LIF
- Unable to vMotion VM with RDM Disks in Data ONTAP
- Unclean removal of multipath devices with Commvault in a HyperScale environment
- Unified Manager No Active Paths To Access LUN alert
- Uninstallation of DSM 4.1 fails With 'Incorrect function' error
- Upgrade Paused due to Duplicate initiators mapped to the same LUN
- Upgrade was paused due to Node not in connected state after giveback
V
- Vendor's File System in a LUN is Corrupted
- Very poor iSCSI write performance with delayed Ack
- Virtual windows cluster outage during ONTAP MCC switchover
- VMs crash after ESXi and HBA driver update
- VMs in hung state and are not accessible from its dedicated host from VMware end
- VMs inaccessible due to vVols being brought offline on NetApp end
- VMs on FC datastore experience continuous/frequent disconnections along with fcp.io.status: AEN 0x8048 events due to faulty storage SFP
- VM's unable to boot after upgrade to ontapp 9.3
- VMware datastore corrupted due to snaprestore being performed on NetApp end
- VMware datastore is not accessible with zero size
- VMware ESXi purple screen damaged datastore
- VMware host can't detect LUNs or ISCSI paths from new nodes
- VMware host using indirect pathing to access fiber channel LUNs in ONTAP
- VMware hostd service become unresponsive with ESXi 6.7 update 3
- VMware lost LUN connectivity after installing new Qlogic Driver
- VMware missing FCP path to node after re-join cluster
- VMware storage outage after ONTAP upgrade
- Vmware VMs becomes inaccessible or hangs during the volume move operation
- Volume size is not increasing when namespace size is increased on GUI
W
- Warning "Unable to list entries for kernel on node "node": Vserver does not exist."
- Warning in Pre-Upgrade check due to presence of user-defined TPGs
- What AIX command can be used to list the Fiber channel devices?
- What are nvme settings regarding io-queue-count and io-queue-depth
- What are SCSI Reservations and SCSI Persistent Reservations?
- What are the correct Windows timeout settings for compatibility with ONTAP?
- What are the guidelines to be followed while increasing the size of a LUN?
- What are the NetApp recommended settings for the multipath.conf file on RHEL OS
- What are the parameters that control how MS iSCSI survives lost TCP connections without causing applications harm?
- What are the recommendations for the host stacks supporting SCSI UNMAP (TRIM) commands for space reclamation?
- What are the recommended MTU settings for ASA C250 iSCSI LUNs with network constraints
- What are the recommended multipathing settings for Oracle Linux with ONTAP?
- What are the recommended settings for Solaris 10 with Ontap?
- What are the requirements for NetApp ONTAP FC-NVMe deployment with ESXi 7.0?
- What are the Solaris Host recommendations for Supporting HUK 6.2
- What are the statistics used to measure indirect data access to LUNs in ONTAP 9?
- What do FCP Partner Path Misconfigured messages mean?
- What does "None Connected" status for the Igroup on System Manager mean?
- What does status=enabled and status=active refer to as per Multipath -ll output on RHEL Host
- What does the LUN option space_alloc do?
- What does the revision number of a LUN provided by Data ONTAP signify?
- What is a Super Logical Unit Reset (SLUR) and how to recover from a hung condition?
- What is maximum size of the LUN which can be provisioned from the Volume ?
- What is the desired state of the FC adapter in maintenance mode
- What is the impact if the LUN type is configured incorrectly?
- What is the impact of selecting the incorrect LUN format in ONTAP?
- What is the information reported by the fcp stats command?
- What is the latest NetApp host utility compatible with AIX v7.3?
- What is the maximum amount of SAN LIFs per port supported in ONTAP?
- What is the maximum length of a iSCSI iqn name
- What is the maximum size to which a LUN can be resized?
- What is the process to add luns from the consistency group as a part of MS cluster?
- What is the proper configuration for a volume containing a LUN?
- What status is returned when a SCSI Test Unit Ready (TUR) command is sent to a LUN that has already been SCSI reserved
- What would be the best way to migrate ESXi boot LUN to a new cluster
- When are "scsi.cmd.selectionTimeout" and "mlm.tapemc.lun.removed" events logged?
- When is in-order delivery (IOD) required and how is it set?
- Where can FlexArray configuration information be found?
- Which Host Utilities can be used for SLES on PowerPC?
- Which network segment should be used for LIFs in a redundant iSCSI configuration
- While trying to enable iSCSI getting error "there are not enough eligible ports on node"
- Why are there Active/Optimized and Active/Unoptimized paths on Windows Server LUNs?
- Why can't we enable automatic failover for ISCSI SAN lifs?
- Why did the number of iscsi sessions decrease before and after ONTAP version upgrade?
- Why do multipath -ll and multipath.conf display different values?
- Why do some volumes have a Junction Path created while others do not under a SAN-only SVM?
- Why does used size of lun show different than used size from lun host ?
- Why does VMware ESXi or Microsoft Hyper-V report more space used than ONTAP LUN
- Why is client LUN used size larger than storage volume used size
- Why is theLUN size greater than its volume max-autosize ?
- Why would an FCP SAN host login to storage, then immediately logout?
- Will a SAN lif migrate to a surviving port after a link failure on its current port ?
- Will a zoning change affect I/O on fibre channel switches?
- Will changing the queue depth on windows VM from 64 to 256 having any impact on the queueing on NetApp NVMe namespace
- Will LUN NAA ID change if old switches are replaced with new switches
- Will NVMe/TCP lif failover during TO/GB or hardware failure
- Windows 2019 sees BSOD when adding SAS device support under MPIO properties
- Windows complains about an ONTAP LUN that the drive can't find the sector requested
- Windows CSV in FC LUN cannot be mounted on all hosts
- Windows Disk mounted on NetApp LUN appear as FAILED dynamic disk in Disk Management
- Windows Disk shows unallocated post 7MTT migration
- Windows Guest OS reporting Event 129 Reset to device, \Device\RaidPort0
- Windows Hosts that are not clustered but access the same LUN may cause corruption
- Windows Hyper-V 2016 iSCSI lun mapping issue
- Windows iSCSI unable to connect to storage
- Windows servers unable to see disks/LUNs post ONTAP upgrade
- WQE failure in EMS with extended status 0x16 frequently occurring

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