What does it mean for a partner disk to show nonzero "Used" in sysconfig -r?

WSANDERSATFLEXERA — Thu, 05 Jun 2025 05:39:30 GMT

I see some disks on my filers's partners showing non-zero "used" in the output of sysconfig -r. Most disks look like this:

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

partner 1c.00.10 1c 0 10 SA:B - BSAS 7200 0/0 847884/1736466816
but a few have non-zero "used":

partner 1c.01.2 1c 1 2 SA:B - BSAS 7200 423111/866531584 847884/1736466816

On the partner, some of these disks are spares and some are in use:

spare 1c.00.10 1c 0 10 SA:A - BSAS 7200 847555/1735794176 847884/1736466816

data 1c.01.2 1c 1 2 SA:A - BSAS 7200 423111/866531584 847884/1736466816

One common characteristic is that the disks that show up with "partner" in the first col all have downsized Used vs Physical capacities listed:

partner	1b.05.10	1b	5 10 SA:A - BSAS 7200 423111/866531584 2543634/5209362816
partner	1b.05.9	1b	5 9 SA:A - BSAS 7200 423111/866531584 2543634/5209362816

etc

My guess is that the non-zero "Used" figure represents a disk that was once in use on the filer, and has been replaced, became a spare, and was reassigned to the partner, and that the "used" information is just the last known sizing information known to the filer that used to own it. Is that correct? I am assuming there will be no difficulties replacing a downsized disk with a correctly sized one, then assigning the disk, which is now a spare, to the cluster partner, where it can be used to its full capacity. Is that assumption correct? Thanks in advance -w

Re: What does it mean for a partner disk to show nonzero "Used" in sysconfig -r?

JGPSHNTAP — Wed, 26 Mar 2014 12:05:02 GMT

Can you share the one where you see non-zero. We aren't talking spares (aggr status -s) are we?

Re: What does it mean for a partner disk to show nonzero "Used" in sysconfig -r?

WSANDERSATFLEXERA — Wed, 26 Mar 2014 15:58:47 GMT

See above:

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

partner 1c.00.10 1c 0 10 SA:B - BSAS 7200 0/0 847884/1736466816
but a few have non-zero "used":

partner 1c.01.2 1c 1 2 SA:B - BSAS 7200 423111/866531584 847884/1736466816

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What does it mean for a partner disk to show nonzero "Used" in sysconfig -r?

Re: What does it mean for a partner disk to show nonzero "Used" in sysconfig -r?

Re: What does it mean for a partner disk to show nonzero "Used" in sysconfig -r?