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MetroCluster IP: Asymmetric partition layouts

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Applies to

  • MetroCluster IP
  • AFF-A300
  • Advanced Disk Partitioning (ADP)
  • ONTAP 9
  • Unusable partitions sizes after shelf expansion

Issue

Different ADP layouts are observed to be in use at both sites.

 

Example:

Aggregate siteA_aggr_n1_root – Partition size: 53.88GB

  • 8 data partitions
  • 1 parity partition
  • 1 dparity partition

RAID group /siteA_aggr_n1_root/plex0/rg0

      RAID Disk   Device      HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      ---------   ------      ------------- ---- ---- ---- ----- --------------    --------------
      dparity     0a.00.0P3   0a    0   0   SA:A   0   SSD   N/A 55176/113000448   55184/113016832 (fast zeroed)
      parity      0a.00.1P3   0a    0   1   SA:A   0   SSD   N/A 55176/113000448   55184/113016832 (fast zeroed)
      data        0a.00.2P3   0a    0   2   SA:A   0   SSD   N/A 55176/113000448   55184/113016832 (fast zeroed)
      data        0a.00.3P3   0a    0   3   SA:A   0   SSD   N/A 55176/113000448   55184/113016832 (fast zeroed)
      data        0a.00.4P3   0a    0   4   SA:A   0   SSD   N/A 55176/113000448   55184/113016832 (fast zeroed)
      data        0a.00.5P3   0a    0   5   SA:A   0   SSD   N/A 55176/113000448   55184/113016832 (fast zeroed)
      data        0a.00.6P3   0a    0   6   SA:A   0   SSD   N/A 55176/113000448   55184/113016832 (fast zeroed)
      data        0a.00.7P3   0a    0   7   SA:A   0   SSD   N/A 55176/113000448   55184/113016832 (fast zeroed)
      data        0a.00.8P3   0a    0   8   SA:A   0   SSD   N/A 55176/113000448   55184/113016832 (fast zeroed)
      data        0a.00.9P3   0a    0   9   SA:A   0   SSD   N/A 55176/113000448   55184/113016832 (fast zeroed)

Aggregate siteB_aggr_n1_root – Partition size: 143.65GB

  • 3 data partitions
  • 1 parity partition
  • 1 dparity partition

RAID group /siteB_aggr_n1_root/plex0/rg0

      RAID Disk   Device      HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      ---------   ------      ------------- ---- ---- ---- ----- --------------    --------------
      dparity     0a.10.12P3  0a    10  12  SA:B   0   SSD   N/A 147102/301265408  147110/301281792
      parity      0a.10.14P3  0a    10  14  SA:B   0   SSD   N/A 147102/301265408  147110/301281792
      data        0a.10.16P3  0a    10  16  SA:B   0   SSD   N/A 147102/301265408  147110/301281792
      data        0a.10.17P3  0a    10  17  SA:B   0   SSD   N/A 147102/301265408  147110/301281792
      data        0a.10.18P3  0a    10  18  SA:B   0   SSD   N/A 147102/301265408  147110/301281792

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