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configuring Raid 4 with 10 disk in FAS 2020

I recently bought FAS2020 with 12 x 1 TB Disks.

Capacity is the most critical factor and we configured FAS 2020 as shown below.

Controller 1

raid 4 with  2 Disk( 1Parity+ 1Data) for aggr0

Controller 2

raid 4 with  10 Disk( 1Parity+ 8Data +1Spare) for aggr0

But in controller 2 it is creating 2 raid group (rg0 & rg1) as shown in blue color.

Kindly suggest a solution to make a single raid group for aggr0 in controller 2.

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NetApp Release 7.3.2

pgnas10> aggr status -r

Aggregate aggr0 (online, raid4) (block checksums)

  Plex /aggr0/plex0 (online, normal, active)

    RAID group /aggr0/plex0/rg0 (normal)

      RAID Disk Device          HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)

      --------- ------          ------------- ---- ---- ---- ----- --------------    --------------

      parity    0c.00.3         0c    0   3   SA:A   -  SATA  7200 847555/1735794176 847884/1736466816

      data      0c.00.5         0c    0   5   SA:A   -  SATA  7200 847555/1735794176 847884/1736466816

      data      0c.00.0         0c    0   0   SA:A   -  SATA  7200 847555/1735794176 847884/1736466816

      data      0c.00.6         0c    0   6   SA:A   -  SATA  7200 847555/1735794176 847884/1736466816

      data      0c.00.7         0c    0   7   SA:A   -  SATA  7200 847555/1735794176 847884/1736466816

      data      0c.00.8         0c    0   8   SA:A   -  SATA  7200 847555/1735794176 847884/1736466816

      data      0c.00.9         0c    0   9   SA:A   -  SATA  7200 847555/1735794176 847884/1736466816

    RAID group /aggr0/plex0/rg1 (normal)

      RAID Disk Device          HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)

      --------- ------          ------------- ---- ---- ---- ----- --------------    --------------

      parity    0c.00.10        0c    0   10  SA:A   -  SATA  7200 847555/1735794176 847884/1736466816

      data      0c.00.11        0c    0   11  SA:A   -  SATA  7200 847555/1735794176 847884/1736466816

Spare disks

RAID Disk       Device          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           0c.00.1         0c    0   1   SA:A   -  SATA  7200 847555/1735794176 847884/1736466816 (not zeroed

Re: configuring Raid 4 with 10 disk in FAS 2020

aggr create aggr1 -r 9 …

see aggr command description for all options. You will need to destroy and re-create aggregate, it is not possible to remove raid group. For SATA disks default raid group size in 8.

Re: configuring Raid 4 with 10 disk in FAS 2020

Thanks aborzenkov for suggestion

How many disks including spare disk can accomodate in raid 4 group for FAS2020.

I am just a beginner in Net App product.

Kindly let me know whether i could configure as below

Controller 1

raid 4 with  2 Disk( 1Parity+ 1Data) for aggr0

Controller 2

raid 4 with  10 Disk( 1Parity+ 8Data +1Spare) for aggr0

regards/themiz

Re: configuring Raid 4 with 10 disk in FAS 2020

Yes, that’s technically possible, although running without spares is not recommended.

Re: configuring Raid 4 with 10 disk in FAS 2020

Is there any solution to make a single raid group with 10 disks (RAID 4)

Re: configuring Raid 4 with 10 disk in FAS 2020

Oh, I am awfully sorry, I completely missed the fact that you are using SATA disks ☹

In this case raid group size is limited to 7 disks, you cannot increase it. What you can do is to create RAID_DP without spares (although as mentioned running without spares is not recommended). Default raid group size for RAID_DP is 14 disks.