That’s OK. The question is how you did this.
Did you create a pool with two mirrored disks (that’s the recommended way) ?
Actually, the term “RAID” refers to various combinations of organizing hard disks, not necessary mirror. TrueNAS is using ZFS filesystem that is superior to hardware RAID controllers, so TN users should use the advantage of ZFS rather than traditional hardware RAID.
I assume that “RAID” is just the name for your pool. If so, “Mirror” would be better name, or even better something like “data-pool”, “VM-pool” or “backup-pool”.
pool: RAID
id: 9704431289387799576
state: ONLINE
status: Some supported features are not enabled on the pool.
(Note that they may be intentionally disabled if the
'compatibility' property is set.)
action: The pool can be imported using its name or numeric identifier, though
some features will not be available without an explicit 'zpool upgrade'.
config:
RAID ONLINE
mirror-0 ONLINE
gptid/335f7a86-4d52-11eb-b8f2-a8a159073850 ONLINE
gptid/338072d7-4d52-11eb-b8f2-a8a159073850 ONLINE
root@freenas[~]# zpool import -o altroot=/mnt RAID
cannot import 'RAID': I/O error
Recovery is possible, but will result in some data loss.
Returning the pool to its state as of Mon Sep 30 09:06:03 2024
should correct the problem. Approximately 68 seconds of data
must be discarded, irreversibly. Recovery can be attempted
by executing 'zpool import -F RAID'. A scrub of the pool
is strongly recommended after recovery.
root@freenas[~]# zpool status -v
pool: RAID
state: ONLINE
status: Some supported and requested features are not enabled on the pool.
The pool can still be used, but some features are unavailable.
action: Enable all features using 'zpool upgrade'. Once this is done,
the pool may no longer be accessible by software that does not support
the features. See zpool-features(7) for details.
scan: resilvered 900K in 00:00:08 with 0 errors on Sat Oct 5 11:31:32 2024
config:
NAME STATE READ WRITE CKS UM
RAID ONLINE 0 0 0
mirror-0 ONLINE 24 0 0
gptid/335f7a86-4d52-11eb-b8f2-a8a159073850 ONLINE 0 0 0
gptid/338072d7-4d52-11eb-b8f2-a8a159073850 ONLINE 0 0 0
errors: No known data errors
pool: freenas-boot
state: ONLINE
status: Some supported and requested features are not enabled on the pool.
The pool can still be used, but some features are unavailable.
action: Enable all features using 'zpool upgrade'. Once this is done,
the pool may no longer be accessible by software that does not support
the features. See zpool-features(7) for details.
scan: scrub repaired 0B in 00:00:30 with 0 errors on Fri Oct 4 03:45:30 2024
config:
NAME STATE READ WRITE CKSUM
freenas-boot ONLINE 0 0 0
da0p2 ONLINE 0 0 0
errors: No known data errors
root@freenas[~]# zpool import WD10WDC
cannot import 'WD10WDC': no such pool available
root@freenas[~]# zpool import -o altroot=/mnt WD10WDC
cannot import 'WD10WDC': no such pool available
root@freenas[~]#
You have three drives and three pools, and the RAID pool uses two drives: something is missing.
Are you able to import the WD40WDC pool?
I suspect you used the drive of WD10WDC to create the RAID pool: if this happened, you cannot recover that pool.
Do you confirm you have a total of 4 HDDs connected? Check the connections (both data and power).
