topic Re: Aggregate extension adding disk drives in ONTAP Discussions

Aggregate extension adding disk drives

danaskazlauskas — Thu, 05 Jun 2025 07:05:22 GMT

Hello,

if I have aggregate made of 13 disks (RAID-DP, RAID group size - 13 disks) and want to add 2 disks to the aggregate, what size of RAID group will I have after extension and how many parity drives?

I am afraid, what these two disks will be assigned as parity disks, because I use not full RAID group for aggregate extension.

Thanks.

BR,

Danas

Re: Aggregate extension adding disk drives

thomas_glodde — Mon, 15 Nov 2010 13:59:05 GMT

netapp box will tell you it needs at least 3 disks (to open up a new raid group with 2 parity and 1 data).

you should rise the raidgroup size to 15, then add 2 disks, i think thats what you are trying to do.

btw, in higher ontap versions, the aggr add command will opt to show you a preview of what is happening, be sure to use that preview

Re: Aggregate extension adding disk drives

danaskazlauskas — Mon, 15 Nov 2010 14:17:54 GMT

Thanks Thomas.

So, as I understand, it quite easy to increase RAID group size in the aggregate - how about decreasing it?

Thanks again.

BR,

Danas

Re: Aggregate extension adding disk drives

thomas_glodde — Mon, 15 Nov 2010 16:04:14 GMT

You can decrease raid size. that new raid group size will be used on expanding/adding raid groups to your aggregate only tho it will NOT shrink EXISTING raid groups.

Re: Aggregate extension adding disk drives

danaskazlauskas — Tue, 16 Nov 2010 07:26:42 GMT

Thanks Thomas.