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Recommended Layout for FAS6210 Disk Upgrade

Hi everyone,

     In our environment we have a 6210 with active-active controllers that it´s using SAN and iSCSI connectivity this storage is primarily use for VMware. We recently purchased a shelf of 24 disks of 450GB SAS that are not assigned to any aggrs yet and I want to know what could be the best RG configuration for performance. The system is running ONTAP 8.0P4. The actual configuration is the following:

Aggregate aggr0 (online, raid_dp) (block checksums)
  Plex /aggr0/plex0 (online, normal, active, pool0)
    RAID group /aggr0/plex0/rg0 (normal)

      RAID DiskDevice  HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
      ---------------  ------------- ---- ---- ---- ----- --------------    --------------
      dparity 1c.00.0 1c    0   0   SA:B   0  SAS  15000 418000/856064000  420584/861357448
      parity  1c.00.1 1c    0   1   SA:B   0  SAS  15000 418000/856064000  420584/861357448
      data    1c.00.2 1c    0   2   SA:B   0  SAS  15000 418000/856064000  420584/861357448
      data    1c.00.3 1c    0   3   SA:B   0  SAS  15000 418000/856064000  420584/861357448
      data    1c.00.4 1c    0   4   SA:B   0  SAS  15000 418000/856064000  420584/861357448
      data    1c.00.5 1c    0   5   SA:B   0  SAS  15000 418000/856064000  420584/861357448
      data    1c.00.6 1c    0   6   SA:B   0  SAS  15000 418000/856064000  420584/861357448
      data    1c.00.7 1c    0   7   SA:B   0  SAS  15000 418000/856064000  420584/861357448
      data    1c.00.8 1c    0   8   SA:B   0  SAS  15000 418000/856064000  420584/861357448
      data    1c.00.9 1c    0   9   SA:B   0  SAS  15000 418000/856064000  420584/861357448
      data    1c.00.101c    0   10  SA:B   0  SAS  15000 418000/856064000  420584/861357448


Pool1 spare disks (empty)

Pool0 spare disks

RAID DiskDevice  HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
---------------  ------------- ---- ---- ---- ----- --------------    --------------
Spare disks for block or zoned checksum traditional volumes or aggregates
spare   1c.00.111c    0   11  SA:B   0  SAS  15000 418000/856064000  420584/861357448 (not zeroed)

Partner disks

RAID DiskDevice  HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
---------------  ------------- ---- ---- ---- ----- --------------    --------------
partner 1c.00.131c    0   13  SA:B   0  SAS  15000 0/0               420584/861357448
partner 1c.00.231c    0   23  SA:B   0  SAS  15000 0/0               420584/861357448
partner 1c.00.171c    0   17  SA:B   0  SAS  15000 0/0               420584/861357448
partner 1c.00.181c    0   18  SA:B   0  SAS  15000 0/0               420584/861357448
partner 1c.00.201c    0   20  SA:B   0  SAS  15000 0/0               420584/861357448
partner 1c.00.221c    0   22  SA:B   0  SAS  15000 0/0               420584/861357448
partner 1c.00.211c    0   21  SA:B   0  SAS  15000 0/0               420584/861357448
partner 1c.00.161c    0   16  SA:B   0  SAS  15000 0/0               420584/861357448
partner 1c.00.151c    0   15  SA:B   0  SAS  15000 0/0               420584/861357448
partner 1c.00.141c    0   14  SA:B   0  SAS  15000 0/0               420584/861357448
partner 1c.00.121c    0   12  SA:B   0  SAS  15000 0/0               420584/861357448
partner 1c.00.191c    0   19  SA:B   0  SAS  15000 0/0               420584/861357448

Any ideas?

I would really apprecitated the help.

Thanks in advance,

German.

Re: Recommended Layout for FAS6210 Disk Upgrade

looks like you already have about 12 disks per aggr. You could keep the 12-disk RG size and expand both aggrs by 12 drives each, ending with 2x 12-disk RGs in each aggr.

Or you could pick a controller to expand more than the other, and do something like:

  1. Set the RG size to 18
  2. Pad the existing RG with 6 disks, ending with 18
  3. Add the rest of the 18 disks in an additional RG
  4. Result: Aggr containing 2 RGs, 18+18 disks.