topic Re: Why is total space size on aggr between controllers are different with same amount of disks? in ONTAP Hardware

Why is total space size on aggr between controllers are different with same amount of disks?

peter1965 — Thu, 05 Jun 2025 06:37:22 GMT

I was creating aggr on my v6210 with 2TB netapp disk. On one controller I created a aggr with 40 disks in a 20 disk raid group.

I did the exact same thing on the other controller and notice the "total space" is different. How can this be? The only thing I can think of is when I initially created an aggr on this controller with a different raid group I went in destroyed it and recreated it to make what I had mentioned above.. Soemthing not "zero" out correctly?

See attached screen shot and how do I go about resolving that?

Re: Why is total space size on aggr between controllers are different with same amount of disks?

aborzenkov — Wed, 18 Jan 2012 03:04:04 GMT

please show output of "aggr show_space" from both filers

Re: Why is total space size on aggr between controllers are different with same amount of disks?

isaacs — Wed, 18 Jan 2012 19:34:08 GMT

It's possible the RAID Group sizes are different, and result in 2 fewer data disks. "aggr status -r" output should confirm/deny that.

Re: Why is total space size on aggr between controllers are different with same amount of disks?

isaacs — Wed, 18 Jan 2012 20:17:54 GMT

Heh, On second thought, take a look at "snap reserve -A". I'll bet the Aggr Snap Reserve is 0 on the original, and the 5% default on the new.

"snap reserve -A netapp_aggr2 0" will set it to zero, and you should see the space.

We're thankfully doing away with that default, and this shouldn't be a needed step going forward. It's only required for SyncMirror/MetroCluster.

Re: Why is total space size on aggr between controllers are different with same amount of disks?

peter1965 — Wed, 18 Jan 2012 21:20:21 GMT

Argh! That was it!! Sticking head in sand as I knew I put that in my script but there was a typo.. Sigh I should of caught that. That what I get for administering filers in what I call hybrid mode (the cli and the sys manager 2.0)

thanks