IBM Support

SHC105 - Disk path not optimal or some paths disabled

Troubleshooting


Problem

For PureData for Analytics system the nzhealthcheck script may report a problem with paths but all paths are up and working.

Symptom

The "nzpush -a mpath -issues" command returns something similar:

spu0105: Encl: 3 Slot: 12 DM: dm-10 HWID: 1169 SN: S0M1H0NP0000B420CLLS PathCnt: 4 PrefPath: no
spu0105: Encl: 6 Slot: 12 DM: dm-27 HWID: 1304 SN: S0M1C68Z0000M416SSYH PathCnt: 4 PrefPath: no
spu0103: Encl: 2 Slot: 8 DM: dm-28 HWID: 1120 SN: S0M1H0FN0000B42099D6 PathCnt: 4 PrefPath: no
spu0103: Encl: 5 Slot: 8 DM: dm-21 HWID: 1255 SN: S0M1CBRA0000B416BTD4 PathCnt: 4 PrefPath: no

All 4 paths are available but system is not using the preferred one.

Resolving The Problem

You can try an online solution first. As user NZ run:


    nzpush -a mpath dm -r
      wait 3 minutes and then check if issue is resolved:
    nzpush -a mpath -issues


If online solution didn't work you will need to power cycle SPU's and Enclosures:

    As user NZ:
    nzstop

    As user ROOT
    /nzlocal/scripts/rpc/spapwr.sh -off all
    wait 5 minutes
    /nzlocal/scripts/rpc/spapwr.sh -on all

    As user NZ
    nzstart


Once database is online run "nzpush -a mpath -issues" to confirm issue is resolved.

[{"Product":{"code":"SSULQD","label":"IBM PureData System"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Component":"Storage","Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"1.0.0","Edition":"All Editions","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
17 October 2019

UID

swg21977410

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