Pool offline - missing drives, can't import pool

TrueNAS General
1

A few days ago, i got a notification indicating that one of the HDDs had encountered read or write errors (dont remember which). At the time, i decided to deal with it later, so i shut down the machine and left it off until yesterday.

Yesterday, i powered it back on to identify which drive had failed and needed replacement. But then the whole pool was gone - it was unaccesible from windows and SMB screamed “path does not exist,”. Also there were 2 unassigned disks. The missing pool was originally based on 5 WD HDDs in a raid-z2 array, plus an ssd for read caching. In the “disks” menu, i saw that 4 or 5 of the disks were not showing up at all.

On the internet i read that exporting and importing back the pool might help, but after exporting i was unable to import it - the list was empty.

I only have a few photos from yesterday taken with my phone (no ss becauseiI thought i’d be able to fix it myself).

There’s a lot of important data on the pool that i really don’t want to lose.

Any help would be appreciated.

Also im using pcie sata controller based on asmedia chip and all HDDs are visible in bios.

2

i cant embed media in a post. sorry

3

Welcome to the Forums - Sorry you are having trouble.

You won’t be able to post images until you have spent enough time here to gain permission for that - typical way is to take the new user “course” the bot offers you, then follow the advice in the second post at Discourse New User Guide - Resources - TrueNAS Community Forums to take the next level course. That should give you enough air time to be able to post images.

Then I suggest that you go here Joes Rules to Asking for Help - Resources - TrueNAS Community Forums and follow the guidance there for asking for help - providing good Information is the key to getting quality answers.

4

Trouble ahead…
Raidz2 is really “ONE drive can fail”—and the second level of redundancy is to deal with further issues during resilver.

And no backup, I suppose? :scream:

That does not tell us whether a SATA port multiplier is involved, unfortunately.

A detailed description of the hardware is in order, alongside any error message and status report. Please paste terminal output as formatted text (</> button).
camcontrol devlist or lsblk as applicable
zpool status -v
zpool import

5

ASUS P8H61-M LX3 R2.0
Pentium G630
8GB DDR3
2x ASMedia 106X Sata Controller
5x WD5000AZLX
2x M2 Sata SSD (hynix and sandisk)
i know its a bit old but it worked just fine (unitl few day ago)

admin@truenas[~]$ lsblk         
NAME     MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINTS
sda        8:0    0 465.8G  0 disk  
└─sda1     8:1    0 465.8G  0 part  
sdb        8:16   0 465.8G  0 disk  
└─sdb1     8:17   0 465.8G  0 part  
sdc        8:32   0 465.8G  0 disk  
└─sdc1     8:33   0 465.8G  0 part  
sdd        8:48   0 465.8G  0 disk  
└─sdd1     8:49   0 465.8G  0 part  
sde        8:64   0 465.8G  0 disk  
└─sde1     8:65   0 465.8G  0 part  
sdf        8:80   0 465.8G  0 disk  
└─sdf1     8:81   0 465.8G  0 part  
sdg        8:96   0 465.8G  0 disk  
└─sdg1     8:97   0 465.8G  0 part  
sdh        8:112  0 119.2G  0 disk  
├─sdh1     8:113  0     1M  0 part  
├─sdh2     8:114  0   512M  0 part  
├─sdh3     8:115  0 102.7G  0 part  
└─sdh4     8:116  0    16G  0 part  
  └─sdh4 253:0    0    16G  0 crypt 
sdi        8:128  0 119.2G  0 disk  
└─sdi1     8:129  0 119.2G  0 part  
sdj        8:144  0 465.8G  0 disk  
└─sdj1     8:145  0 465.8G  0 part  

admin@truenas[~]$ sudo zpool status -v
[sudo] password for admin: 
  pool: boot-pool
 state: ONLINE
  scan: scrub repaired 0B in 00:00:16 with 0 errors on Sat Aug 31 03:45:18 2024
config:

        NAME        STATE     READ WRITE CKSUM
        boot-pool   ONLINE       0     0     0
          sdh3      ONLINE       0     0     0

errors: No known data errors

  pool: vdev1
 state: ONLINE
  scan: resilvered 1.60M in 00:00:03 with 0 errors on Tue May  6 14:03:46 2025
config:

        NAME                                      STATE     READ WRITE CKSUM
        vdev1                                     ONLINE       0     0     0
          raidz2-0                                ONLINE       0     0     0
            c118a0e1-1488-4284-8143-11a2c60e7153  ONLINE       0     0     0
            e60e3e8a-49e4-48d1-b90d-e8fe69a1a488  ONLINE       0     0     0
            ccbb6929-878b-4c5b-ad9d-190ae9bb819a  ONLINE       0     0     0
            07c55cbb-73c3-4899-957a-2c7287f6acad  ONLINE       0     0     0
            91ab7912-0010-426a-abca-92fbf467f35d  ONLINE       0     0     0
        logs
          dd4ad754-5999-4acf-bc49-89d5cf0febc4    ONLINE       0     0     0

errors: No known data errors

  pool: vdev2
 state: ONLINE
  scan: scrub repaired 0B in 00:26:32 with 0 errors on Sat Dec  7 18:27:30 2024
config:

        NAME                                      STATE     READ WRITE CKSUM
        vdev2                                     ONLINE       0     0     0
          raidz1-0                                ONLINE       0     0     0
            53d516d6-4301-4a6e-ad06-c814bf24af7d  ONLINE       0     0     0
            3f03fcf2-c02c-4a4b-9aa0-7bfc3b12f24b  ONLINE       0     0     0
            1986c0e5-2189-414a-a647-98bda3c13112  ONLINE       0     0     0

errors: No known data errors
admin@truenas[~]$

(vdev1 is the one im not able to import)

admin@truenas[~]$ sudo zpool import
no pools available to import
6

Mmh, probably I am missing something here, but maybe you cannot import the pool because it already is online?
Can you access the webui?

1 Like