Please forgive me as my skills and knowledge is limited here. I am using HEX os is what i used to install truenas scale i believe. About 2 weeks ago i got a email noting there was an ZFS error on one drive. I did what i could and with chatgpt came to the conclusion i need to run a scrub to see if the error would resolve. Woke up the next day with several email from Hex os with the system errors and the system would not boot. After a lot of troubleshooting and not alot of help from chat i was able to get the system to boot after exporting the drive pool with none of the drives connected. Now i can view the drive pool in read only mode but it does show an error in one of the “data sets” (i think that is the term). I am not confident that chat can walk me through properly recovering the drive pool and I have not got much help on the Hex forums as of yet. Hoping to find help here. Below is the Zpool status i have from putty.
XXXXXXXXXXXXXXXX# zpool status HDDs
pool: HDDs
state: ONLINE
status: One or more devices has experienced an error resulting in data
corruption. Applications may be affected.
action: Restore the file in question if possible. Otherwise restore the
entire pool from backup.
see: [https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-8A](https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-8A)
scan: scrub repaired 252K in 08:33:06 with 17 errors on Mon Jan 12 17:28:14 2026
expand: expanded raidz1-0 copied 4.65T in 12:39:26, on Fri Dec 13 05:59:05 2024
config:
NAME STATE READ WRITE CKSUM
HDDs ONLINE 0 0 0
raidz1-0 ONLINE 0 0 0
6a2f9722-779d-4ad9-a174-66d6856dff9b ONLINE 0 0 0
b610e5ec-7716-4689-9f8c-e4d25b40959b ONLINE 0 0 0
5c46ab8b-82b6-436d-bcc6-e85461f55589 ONLINE 0 0 0
0a46c882-dcb8-457e-8733-fd2a13e37e14 ONLINE 0 0 0
errors: 17 data errors, use '-v' for a list
Earlier information in the process.
Update:
I exported the pool from true nas and i can get it to boot with all 4 drives connect. However it crashed immediately when trying to import.
invalid or corrupt cache file contents: invalid or missing cache file
cannot import ‘HDDs’: no such pool available
XXXXXXXXXXXXXXXX\[\~\]# zpool import
pool: HDDs
id: 14370529907006270995
state: ONLINE
action: The pool can be imported using its name or numeric identifier.
config:
HDDs ONLINE
raidz1-0 ONLINE
6a2f9722-779d-4ad9-a174-66d6856dff9b ONLINE
b610e5ec-7716-4689-9f8c-e4d25b40959b ONLINE
5c46ab8b-82b6-436d-bcc6-e85461f55589 ONLINE
0a46c882-dcb8-457e-8733-fd2a13e37e14 ONLINE
xxxxxxxxxxxxxxxxxxxx \[\~\]# zpool import -f -c /dev/null HDDs
invalid or corrupt cache file contents: invalid or missing cache file
cannot import 'HDDs': no such pool available
xxxxxxxxxxxxxxxxxx# zpool import -f -c /dev/null 14370529907006270995
invalid or corrupt cache file contents: invalid or missing cache file
cannot import '14370529907006270995': no such pool available
Please post command line results back using Preformatted Text mode (</>) or Ctrl+e on the reply toolbar.
A detailed listing of your hardware and OS version may help.
The following will give us some data on your system and pool status. Run each and post back in a separate Preformatted Text box for each. It makes it easier to read.
sudo zpool status -v
pool: HDDs Recovery
state: ONLINE
config:
NAME STATE READ WRITE CKSUM
HDDs Recovery ONLINE 0 0 0
c99fcc23-b2fa-483d-95f7-0ce8186db1fc ONLINE 0 0 0
errors: No known data errors
pool: boot-pool
state: ONLINE
scan: scrub repaired 0B in 00:01:35 with 0 errors on Tue Jan 13 03:46:37 2026
config:
NAME STATE READ WRITE CKSUM
boot-pool ONLINE 0 0 0
sdg3 ONLINE 0 0 0
errors: No known data errors
sudo zpool import
pool: HDDs
id: 14370529907006270995
state: ONLINE
action: The pool can be imported using its name or numeric identifier.
config:
HDDs ONLINE
raidz1-0 ONLINE
6a2f9722-779d-4ad9-a174-66d6856dff9b ONLINE
b610e5ec-7716-4689-9f8c-e4d25b40959b ONLINE
5c46ab8b-82b6-436d-bcc6-e85461f55589 ONLINE
0a46c882-dcb8-457e-8733-fd2a13e37e14 ONLINE
I created a new pool in preparation to copy data from the corrupted pool. HDDs is the current pool that i cannot import with out crashing the system. HDDs Recovery is the pool I created to be ready to copy data.
