Module NSM100 from NS224 not available

Applies to

• All AFF systems with NS224 shelf
• NSM100 shelf module

Issue

• Storage port fails in both nodes, connected to the same NSM100 module

[node_name-1: kernel: netif.linkDown:info]: Ethernet e5a: Link down, check cable.
[node_name-1: intr: netif.linkDown:info]: Ethernet e5a-30: Link down, check cable.
[node_name-1: scsi_cmdblk_strthr_admin: scsi.cmd.pastTimeToLive:error]: Disk device e5a.40.0.0L0: request failed after try #1: cdb 0xe2.

[node_name-2: kernel: netif.linkDown:info]: Ethernet e3b: Link down, check cable.
[node_name-2: intr: netif.linkDown:info]: Ethernet e3b-30: Link down, check cable.
[node_name-2: scsi_cmdblk_strthr_admin: scsi.cmd.pastTimeToLive:error]: Disk device e3b.40.1.12L0: request failed after try #1: cdb 0xe2.

• Event messages reporting a path lost to the NS224 shelf:

[node_name-1: nchmd: hm.alert.raised:alert]: Alert Id = NoPathToNSMB_Alert , Alerting Resource = 012345678910111213 raised by monitor node-connect
[node_name-1: dsa_disc: shelf.config.tomixed:notice]: System has transitioned to a mixture of single path, multi-path or quad-path storage configurations.

or:

EventMessage = warning event on node_name-1 (Disk Shelf Multipath Not Configured)
ocumEventMessageDetails = Disk shelf has either one or no path connected to the node.
 

• system health alert show output:

Monitor node-connect
Alert ID NoPathToNSMA_Alert
Alerting Resource XXXXXXXXXXXXXXXXXXX
Subsystem SAS-connect
Indication Time Sun May 08 22:44:17 2022
Perceived Severity Major
Probable Cause Cable_tamper
Description Controller node_name-1 is connected only to module B of shelf 10.10 through port e3b.
Corrective Actions
1. Consult the guide applicable to your NVMe storage shelf to review cabling rules for your system.
2. Connect controller node_name-1 to module A and module B of shelf 10.10.
Possible Effect You will lose access to shelf 10.10 if module B fails.

• system node run -node node_name-1 -command sysconfig -a output, showing one path down and a "missing" module:

slot 0: 40G/100G Ethernet Controller CX5
    e0c MAC Address:    00:11:22:33:44:55 (auto-100g_cr4-fd-up)
        QSFP Vendor:         Molex
        QSFP Part Number:    112-00574
        QSFP Serial Number:  99A0123456789
        00.0.0: NETAPP   X4011S172B3T8NTE NA56 3662.5GB 4160B/sect (S99YNA9MB00001)
          ...
        00.0.23: NETAPP   X4011S172B3T8NTE NA56 3662.5GB 4160B/sect (S99YNA9MB00024)
        Shelf 0: NS224NSM100  Firmware rev. NSM100 A: 0151   B: ----
slot 0: 40G/100G Ethernet Controller CX5
    e0f MAC Address:    d0:39:ea:15:0b:d0 (auto-unknown-fd-down)
        QSFP Vendor:         Molex
        QSFP Part Number:    112-00574
        QSFP Serial Number:  99A0123456780
 

• System transitions from Multi-Path HA to Single-Path HA configuration when one module fails:

::> storage shelf show -instance
Modules:                                        
                               Monitor   Is     ... Operational Module
ID Part No.      ES Serial No. is Active Master ... Status      Location
--- ------------ ------------- --------- ------ ... ----------- --------------
  a -            -             true      false  ... error       rear of the shelf at the top, on module A
  b 111-04256+B1 xxxxxxxxxxxx  true      true   ... normal      rear of the shelf at the bottom, on module B