This is my main pool in terms of capacity, so I can’t possibly have a full backup of it.
For the context, most subsets of data have backup somewhere.
Though it’d be quite a bit of work to piece it back together. And that excepts a huge and dear movie collection, too big to have a backup 
My main VM, a docker host, provides lots of services, and rely on that pool for storage. That’s the main thing really. Backup of its data is available, but I’d have to rebuild the host.
I’m using TN Scale 24.10.2
My hardware is made of:
- a boot pool on an SSD (Crucial BX500 120Go)
- a RAIDZ2 6x 12TB WD122KRYZ (WD Gold Enterprise Class SATA HDD)
(and, taken from my old /community signature:)
- Supermicro A2SDi-H-TF (Atom C3758 8 cores)
- 64GB ECC RAM
- SilverStone D380 chassis (not well ventilated)
zpool status -v doesn’t know about my pool
zpool status -v subramanya
cannot open 'subramanya': no such pool
zfs list doesn’t list subramanya
When you provide your system hardware makeup and which version of TrueNAS you are running, did you cause the REMOVED or was all this done on it’s own?
The REMOVE was done on its own. It’s the first email alert, and it says:
The following devices are not healthy:
- Disk WDC_WDXXXX
B002R13D is REMOVED
Whatever you do, wait for someone to tell you what to do. You should be able to copy any important files off the server now. If they are all important, copy the most important files. You don’t want to put a lot of stress on the pool however if you have a few TB of data you “must have”, grab it now.
I don’t have access to anything unfortunately!
Then we’ll see about solving this “I/O Error” (any more details from the error message?)
Nope, just exactly this:
# zpool import subramanya
cannot import ‘subramanya’: I/O error
Destroy and re-create the pool from
a backup source.
smartctl -x /dev/sda
...
smartctl -x /dev/sdf
all passed a short test successfully that was run after the pool got suspended.
I’m gonna post a dedicated smartctl -x result in subsequent post as it’s very lengthy.
