zpool Reporting Incorrect Disk Capacities

[Old Garth]

I recently replaced all the disks in an existing pool in TrueNAS Scale (Cobia) in order to expand capacity (offline, replace, resilver, repeat). For some reason, the pool is not auto expanding, and although I think I've found some hint, I do not understand why.

Previously, all disks were 8TB nominal capacity, and all of the new disks are 18TB nominal capacity. TrueNAS Scale (the middleware) is not reporting any errors, and shows all disks at their 18TB capacity. I don't have quotas set.

Code:

zpool get autoexpand

shows the following:

but

Code:

zpool list -v tank

shows:

Note that the size is still listed at 7.28T (8TB nominal). These drives have been replaced and this should read 16.4T, consistent with the other drive capacities. Somehow, I think this is linked to the pool not auto expanding, but I'm not sure how to get ZFS to "update" this table. I have tried

Code:

zpool online -e tank <NAME>

to no avail.

Any suggestions on how I get this pool to update and/or auto expand?

 

[danb35]

For some reason, the pool is not auto expanding

Known bug, though it was supposed to have been fixed in 23.10.2. To fix it, see:

Manual disk replacement in TrueNAS SCALE

wiki.familybrown.org

 

[Old Garth]

Thanks, that worked.

For anyone who needs a tl;dr version/command:

Code:

# run as root
# check zpool list to confirm incorrect sized for partuuids
zpool list -v <poolName>

# use partuuid to find device name
ls -l /dev/disk/by-partuuid/<deviceName>

# confirm device ID against lsblk and identify partition (by default in TrueNAS this is partition 1)
lsblk

# command to expand partition to 100%
parted /dev/<device> resizepart <num> 100%