Can't access pool or data after hard disk failure

TrueNAS General
1

I have 6 disks in one pool on TrueNAS Scale, called media-library. One of the drives failed and I subsequently physically removed it from the server.

If I click on Import pool, I dont see any pools in the drop down menu.

In the TrueNAS shell, the media-library pool does not appear

admin@truenas[/mnt]$ sudo zpool list
NAME        SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP    HEALTH  ALTROOT
boot-pool    47G  2.45G  44.5G        -         -     3%     5%  1.00x    ONLINE  -
personal   3.62T  1.08T  2.54T        -         -    10%    29%  1.00x    ONLINE  /mnt

admin@truenas[/mnt]$ sudo zpool import -Fn -R media-library
   pool: media-library
     id: 14847887070566604734
  state: UNAVAIL
status: One or more devices contains corrupted data.
 action: The pool cannot be imported due to damaged devices or data.
   see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-5E
 config:

	media-library                           UNAVAIL  insufficient replicas
	  e874f8a9-4c2f-4ee9-b32d-e0656667c2a6  ONLINE
	  0874ff3f-464b-417e-bba6-5a40b701efca  ONLINE
	  b831aa27-7bfd-4ccb-a325-a6883631353c  ONLINE
	  e224c1df-e213-42c0-9e79-37297bcfdf68  ONLINE
	  1e3ee527-620b-497c-8ddb-08d8f76f15ab  UNAVAIL
	  a693dae9-f152-4e70-8639-2fb1c484613f  ONLINE

My intentions are to export all the data on these 5 remaining disks in that pool into one 14TB disk (which I havent installed yet).
Is it possible to do so? or are all my data gone?

Thanks.

System info:
OS Version:TrueNAS-SCALE-23.10.1.3

Product:Standard PC (Q35 + ICH9, 2009)

Model:QEMU Virtual CPU version 2.5+

Memory:8 GiB

2

I cant seem to embed media in the post, not can I post a link. I wanted to show a screenshot of the TrueNAS GUI

3

Hi and welcome to the forums.

I’m afraid to say it appears your pool was made up of a 6 disk stripe meaning if one disk fails (which it has) you lose the pool.

2 Likes
4

I’ve upped your trust level so you should be able to now.

5

Yes - as @Johnny_Fartpants says, it looks like your media-library pool was 6x disks as a stripe and this configuration has absolutely no redundancy so when you lose one drive you lose the entire pool.

It is likely that large media files will be each be spread across the 6 drives, so even a very expensive ZFS data recovery company probably won’t be able to recover anything.

Your media library data is gone for good. Sorry.

6

Thank you guys for the reply, and confirmation that my data is lost. Its unfortunate.
As you can tell, im a novice with TrueNAS, still learning. Any recommendation how I can set up the new 14TB in a none stripe way?

7

If you are using 5 disks then I’d suggest either a 5 disk Z2 or 2 sets of 2 disk mirrors with a hot-spare.

With 6 disks then just a Z2.

8

got it, thanks!