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Spare disk low caused by automatic auto-partitioning after ONTAP upgrade

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Applies to

  • ONTAP 9.x
  • Advanced Drive Paritioning  (ADP)
  • FAS Systems
  • All Flash FAS (AFF)

Issue

  • AGGR with both partitioned and non-partitioned.
  • After upgrading ONTAP, the system automatically partitions the spare disk on the whole drives.
    • Sysconfig -r log before ONTAP upgrade:
      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       0a.10.10P3    0a    10  10  SA:A   0   SSD   N/A 55176/113000448   55184/113016832 (fast zeroed)
      spare      0a.10.11P3    0a    10  11  SA:A   0   SSD   N/A 55176/113000448   55184/113016832 (fast zeroed)
      spare       0d.11.11   0d    11  11 SA:B   0   SSD   N/A 7325400/15002419712 7325650/15002931888 
    • Sysconfig -r log after ONTAP upgrade:
      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       0a.10.10P3    0a    10  10  SA:A   0   SSD   N/A 55176/113000448   55184/113016832 (fast zeroed)
      spare       0a.10.11P3    0a    10  11  SA:A   0   SSD   N/A 55176/113000448   55184/113016832 (fast zeroed)
      spare       0d.11.11P3 0d    11  11 SA:B   0   SSD   N/A 55176/113000448   55184/113016832 
      spare       0d.11.11P1 0d    11  11  SA:B   0   SSD   N/A 3635089/7444663808 3635097/7444680192 
  • As a result, there is no suitable spare disk available for AGGR using an unpartitioned whole disk.

    RAID group /aggr1/plex0/rg1 (normal, block checksums)
      RAID Disk    Device      HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      ---------    ------      ------------- ---- ---- ---- ----- --------------    --------------
      dparity     0d.11.0     0d    11  0   SA:B   0   SSD   N/A 7325400/15002419712 7325650/15002931888 
      parity      0d.11.1     0d    11  1   SA:B   0   SSD   N/A 7325400/15002419712 7325650/15002931888 
      data        0d.11.2     0d    11  2   SA:B   0   SSD   N/A 7325400/15002419712 7325650/15002931888 
      data        0d.11.3     0d    11  3   SA:B   0   SSD   N/A 7325400/15002419712 7325650/15002931888 
      data        0d.11.4     0d    11  4   SA:B   0   SSD   N/A 7325400/15002419712 7325650/15002931888 
      data        0d.11.5     0d    11  5   SA:B   0   SSD   N/A 7325400/15002419712 7325650/15002931888

  • Partitioning caused a shortage of spare disks, triggering the SPARES_LOW notification.

   HA Group Notification (SPARES_LOW) ERROR

   config_thread: callhome.spares.low:error]: Call home for SPARES_LOW: /aggr1/plex0/rg1

  • Logs indicate insufficient partitions (P1 or P2) in the spare disk configuration before andafter the upgrade.

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