topic Re: configuring Raid 4 with 10 disk in FAS 2020 in ONTAP Hardware

configuring Raid 4 with 10 disk in FAS 2020

petrogasep — Thu, 05 Jun 2025 07:02:27 GMT

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.

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

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

aborzenkov — Tue, 11 Jan 2011 12:41:58 GMT

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

petrogasep — Tue, 11 Jan 2011 12:57:46 GMT

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

aborzenkov — Tue, 11 Jan 2011 13:09:58 GMT

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

Re: configuring Raid 4 with 10 disk in FAS 2020

petrogasep — Tue, 11 Jan 2011 13:42:32 GMT

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

aborzenkov — Tue, 11 Jan 2011 14:44:58 GMT

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.