ONTAP Hardware

configuring Raid 4 with 10 disk in FAS 2020

petrogasep

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

5 REPLIES 5

aborzenkov

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.

petrogasep

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

aborzenkov

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

petrogasep

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

aborzenkov

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.

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