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Spare disks get auto-partitioned when not needed

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Applies to

  • ONTAP 9
  • RAID groups with partitioned and not partitioned drives within the same aggregate.

Issue

  1. Partner node is under spare low condition:

    • Partner node:

      RAID group /aggr1_n1/plex0/rg1 (normal, block checksums)

      RAID Disk    Device      HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      ---------    ------      ------------- ---- ---- ---- ----- --------------    --------------
      dparity     2a.01.18P1    2a    1   18  SA:A   0   SSD   N/A 7294921/14939998720 7294929/14940015104 (fast zeroed)
      parity      9b.02.18P1    9b    2   18  SA:B   0   SSD   N/A 7294921/14939998720 7294929/14940015104 (fast zeroed)
      data        2a.01.6P1    2a    1   6   SA:A   0   SSD   N/A 7294921/14939998720 7294929/14940015104 (fast zeroed)
      data        9b.02.6P1    9b    2   6   SA:B   0   SSD   N/A 7294921/14939998720 7294929/14940015104 (fast zeroed)
      ...

      Pool0 spare disks

      RAID Disk Device   HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      --------- ------   ------------- ---- ---- ---- ----- --------------    --------------
      Spare disks for block checksum
      spare    9b.02.22P3 9b    2   22  SA:B   0   SSD   N/A 61153/125241856   61161/125258240 (fast zeroed)   
      spare    9b.02.23P3 9b    2   23  SA:B   0   SSD   N/A 61153/125241856   61161/125258240 (fast zeroed)

    • Local node have one whole spare disk available:

      Pool0 spare disks

      RAID Disk    Device      HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      ---------    ------      ------------- ---- ---- ---- ----- --------------    --------------
      Spare disks for block checksum
      spare       9b.02.10P3    9b    2   10  SA:A   0   SSD   N/A 61153/125241856   61161/125258240 (fast zeroed)
      spare       9b.02.11P3    9b    2   11  SA:A   0   SSD   N/A 61153/125241856   61161/125258240 (fast zeroed)
      spare       2c.11.14    2c    11  14  SA:B   0   SSD   N/A 14651040/30005330432 14651290/30005842608 (not zeroed)

  2. Local disk is automatically partitioned although an unpartitioned spare disk is required on local:

    • Partner node: 

      Pool0 spare disks

      RAID Disk Device   HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      --------- ------   ------------- ---- ---- ---- ----- --------------    --------------
      Spare disks for block checksum
      spare    9b.02.22P3 9b    2   22  SA:B   0   SSD   N/A 61153/125241856   61161/125258240 (fast zeroed)
      spare    9b.02.23P3 9b    2   23  SA:B   0   SSD   N/A 61153/125241856   61161/125258240 (fast zeroed)
      spare    2c.11.14P1 2c    11  14  SA:A   0   SSD   N/A 7294921/14939998720 7294929/14940015104 (fast zeroed)

    • Local node:

      RAID group /aggr1_n2/plex0/rg2 (normal, block checksums)

        RAID Disk    Device      HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
        ---------    ------      ------------- ---- ---- ---- ----- --------------    --------------
        dparity     2c.11.12    2c    11  12  SA:B   0   SSD   N/A 14651040/30005330432 14651290/30005842608 (fast zeroed)
        parity      9d.12.12    9d    12  12  SA:A   0   SSD   N/A 14651040/30005330432 14651290/30005842608 (fast zeroed)

      Pool0 spare disks

      RAID Disk    Device      HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      ---------    ------      ------------- ---- ---- ---- ----- --------------    --------------
      Spare disks for block checksum
      spare       2c.11.14P3    2c    11  14  SA:B   0   SSD   N/A 61153/125241856   61161/125258240 (fast zeroed)
      spare       9b.02.10P3    9b    2   10  SA:A   0   SSD   N/A 61153/125241856   61161/125258240 (fast zeroed)
      spare       9b.02.11P3    9b    2   11  SA:A   0   SSD   N/A 61153/125241856   61161/125258240 (fast zeroed)
      spare       2c.11.14P2    2c    11  14  SA:B   0   SSD   N/A 7294921/14939998720 7294929/14940015104 (fast zeroed)

  3. Aggregates or RAID groups with unpartitioned disks don't have spare drives available in local, caused local spare low condition:

[LocalNode: config_thread: raid.rg.spares.low:error]: /aggr1_n2/plex0/rg2

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