Unhealthy pool

[Bloodyfisted]

I know there's a lot of posts about unhealthy pools, but i feel like mine in particular is a little different.... I checked all the drives using smartctl and they all reporting "SMART overall-health self-assessment test result: PASSED". TIA

Code:

zpool status -x
  pool: backup
 state: ONLINE
status: One or more devices has experienced an unrecoverable error.  An
    attempt was made to correct the error.  Applications are unaffected.
action: Determine if the device needs to be replaced, and clear the errors
    using 'zpool clear' or replace the device with 'zpool replace'.
   see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-9P
  scan: resilvered 45.1M in 00:00:02 with 0 errors on Fri Apr 22 15:51:42 2022
config:

    NAME                                            STATE     READ WRITE CKSUM
    backup                                          ONLINE       0     0     0
      raidz2-0                                      ONLINE       0     0     0
        gptid/dc021ce6-bf69-11ec-ab04-90e2ba2b614a  ONLINE       0     0     0
        gptid/decfff62-bf69-11ec-ab04-90e2ba2b614a  ONLINE       0     0     0
        gptid/e097da68-bf69-11ec-ab04-90e2ba2b614a  ONLINE       0     0     0
        gptid/e25547cf-bf69-11ec-ab04-90e2ba2b614a  ONLINE       0     0     0
        gptid/e7bd7a0f-bf69-11ec-ab04-90e2ba2b614a  ONLINE       0     0     0
        gptid/e4b5bc9c-bf69-11ec-ab04-90e2ba2b614a  ONLINE       0     0     0
      raidz2-1                                      ONLINE       0     0     0
        gptid/dbe77552-bf69-11ec-ab04-90e2ba2b614a  ONLINE       0     0     0
        gptid/d8f9de5a-bf69-11ec-ab04-90e2ba2b614a  ONLINE       0     0     0
        gptid/d913a0bc-bf69-11ec-ab04-90e2ba2b614a  ONLINE       0     0     0
        gptid/e0ae97c2-bf69-11ec-ab04-90e2ba2b614a  ONLINE       0     0     0
        gptid/e5b93f63-bf69-11ec-ab04-90e2ba2b614a  ONLINE       0     0     0
        gptid/e26d39ec-bf69-11ec-ab04-90e2ba2b614a  ONLINE       0     0     1

errors: No known data errors

 

[jgreco]

Welcome to the forums.

Sorry to hear you're having trouble. Please take a few moments to review the Forum Rules, conveniently linked at the top of every page in red, and pay particular attention to the section on how to formulate a useful problem report, especially including a detailed description of your hardware.

You've basically given no one anything to work with, so the responses will tend to be random guesses rather than anything useful. My guess would be that you've used a RAID controller or other crappy attachment technology. If you have, please refer to

What's all the noise about HBAs, and why can't I use a RAID controller?

1) An HBA is a Host Bus Adapter. This is a controller that allows SAS and SATA devices to be attached to, and communicate directly with, a server. RAID controllers typically aggregate several disks into a Virtual Disk abstraction of some sort...

www.truenas.com

In general, using anything other than Intel AHCI SATA, Intel PCH SCU, or LSI HBA with proper firmware tends to offer great opportunities for random read/write issues that ZFS may interpret as drive failures, resulting in what you're seeing. Please make sure you are using hardware that is on the recommended hardware lists in the Resources section of this forum.

 

[Bloodyfisted]

I am using a jbod with an iscsi controller.
Dell r230
CPU: Intel(R) Xeon(R) CPU E5-2420 0 @ 1.90GHz (1900.04-MHz K8-class CPU)
RAM: 32 GB
Version: TrueNAS-12.0-U7

 

[jgreco]

That's definitely not expected to work. You need SATA or SAS connectivity. ZFS will push crushing amounts of load at its pool, and an iSCSI or fiber channel pool share a teeny amount of bandwidth amongst a large amount of drives, running the storage through a card that generally doesn't cope well with that sort of thing. This is defined to be the "crappy attachment technology" I referred to above.