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    • How does NetApp ensure the integrity of data on returned disks?
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/How_does_NetApp_ensure_the_integrity_of_data_on_returned_disks
      Disk Drives While handling Return Merchandise Authorization (RMA) disks: NetApp has established procedures for the management of Hard Disk Drives returned through the RMA process from the point of shi...Disk Drives While handling Return Merchandise Authorization (RMA) disks: NetApp has established procedures for the management of Hard Disk Drives returned through the RMA process from the point of shipment through testing, overwriting, and final disposition. At no point in this process do any NetApp or NetApp-contracted personnel access customer data residing on a returned drive. For more information regarding this process, refer to the Hard Disk Drive RMA & Data Overwriting Process page.
    • What are the key considerations for moving storage between storage systems?
      https://kb.netapp.com/Support/csm-sam/What_are_the_key_considerations_for_moving_storage_between_storage_systems
      Applies to FAS/AFF Shelf Drive Log in to see the answer. Additional Information Add drives to a node or shelf How to Repurpose an HA Pair with ONTAP 9 How to remove a shelf Will changing the physical ...Applies to FAS/AFF Shelf Drive Log in to see the answer. Additional Information Add drives to a node or shelf How to Repurpose an HA Pair with ONTAP 9 How to remove a shelf Will changing the physical location of a storage system cause any issues with the warranty or maintenance for the asset
    • Disk have no signal from the same shelf bay
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Disk_have_no_signal_from_the_same_shelf_bay
      [?] Mon Jan 16 01:50:01 KST [node02: disk_server_0:disk.IO.status:debug]: params: {'deviceName': '0d.10.3', 'returnCode': '2','pathRetryCount': '0', 'adapterStatus': '0xd', 'cdb':'0x88:000000012228408...[?] Mon Jan 16 01:50:01 KST [node02: disk_server_0:disk.IO.status:debug]: params: {'deviceName': '0d.10.3', 'returnCode': '2','pathRetryCount': '0', 'adapterStatus': '0xd', 'cdb':'0x88:0000000122284080:00000240', 'basicTimeout': '10', 'iASCQ': '0x0','iSenseKey': '0x0', 'sSenseCode': '', 'ETime': '10568', 'iASC': '0x0','victimRetryCount': '10', 'sSenseKey': 'SCSI:no sense', 'targetStatus': '0x0','disk_information': 'Disk 0d.10.3 Shelf 10 Bay 3 [NETAPP X308_HMRKP03TSSM NA00] S/N [xxxxxxxx] UID[50…
    • Does disk reconstruction lead to performance impact?
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/Does_disk_reconstruction_lead_to_performance_impact
      For systems close to a resource bottleneck either at CPU or the disk layer, this can lead to an increase in overall latency Add disks which will spread workload across more spindles to increase the I/...For systems close to a resource bottleneck either at CPU or the disk layer, this can lead to an increase in overall latency Add disks which will spread workload across more spindles to increase the I/O bandwidth. Note: The process of rebuilding the data from parity from a failed drive is more impactful than performing a sick disk copy When should a drive be failed (rebuild) versus letting it fail gracefully (sick disk copy)?
    • E and EF Series volume read performance issue on random i/o workload
      https://kb.netapp.com/on-prem/E-Series/SANtricity-OS-KBs/E_and_EF_Series_volume_read_performance_issue_on_random_i_o_workload
      Applies to All E and EF series arrays Issue Read and Write latency on the volume is more than 90ms where the volume pieces resides either on SSD or SAS based drives.