[SOLVED] New system: Boot disk failure when deleting credentials

TrueNAS General
1

This is a new system with 4x 4TB WD CMR in mirror, I installed the system using 2x 120GB SSD in mirror. I’m novice and this is my first NAS.

When deleting a credential, the spinning icon kept spinning and spinning, then a saw a boot disk failure message.

I do not know if the problem happened to the TrueNAS-0 boot disk or its TrueNAS-1 mirror boot disk.

No more problems or errors were displayed for the next 4h I kept playing around, so I don’t know if that was a system freezing for whatever reason or something more seriously.

I would rather do it now or even start from scratch again if I have to with new SSDs batch while there is no data into those disks than a month later.

When checking the error, it took me to a page where I did see an option “Replace” so I’m assuming I can replace the boot disk physically without doing clean install or if TrueNAS-1 will replace TrueNAS-0 currently as the main disk.

But I cannot find that page with disks errors.

Does TrueNAS documentation has anything related to running disks CLI tests on those boot disks??

Thanks a lot

2

Done

#Check the boot disks status

sudo zpool status boot-pool

        NAME        STATE     READ WRITE CKSUM
        boot-pool   ONLINE       0     0     0
          mirror-0  ONLINE       0     0     0
            sdf3    ONLINE       0     0     3
            sdd3    ONLINE       0     0     0

-----------------------------------------------------

#Detach the bad one
sudo zpool detach boot-pool sdf3

-----------------------------------------------------

#Remove it and install the new one
#Via UI, click on the only boot disk and click Attach

-----------------------------------------------------

 sudo zpool status boot-pool     

  pool: boot-pool
 state: ONLINE
  scan: resilvered 5.10M in 00:00:00 with 0 errors on Wed Mar 11 16:52:36 2026
config:

        NAME        STATE     READ WRITE CKSUM
        boot-pool   ONLINE       0     0     0
          sdd3      ONLINE       0     0     0

       NAME        STATE     READ WRITE CKSUM
        boot-pool   ONLINE       0     0     0
          mirror-0  ONLINE       0     0     0
            sde3    ONLINE       0     0     0
            sdd3    ONLINE       0     0     0

Weirdly tho, the boot option show shows:

debian (P4: <SERIAL_NUMBER>
debian (P4: <SERIAL_NUMBER>
TrueNAS (P3: <SERIAL_NUMBER>

Now repeat with me: I WILL NEVER TOUCH /etc/default/grub.d/truenas.cfg AGAIN!!

I was checking sudo dmesg coz I do see some errors during the boot just to see what sup.
There is a bunch of:

ACPI BIOS Error (bug): Could not resolve symbol [_SB.PCI0.SAT0.PRT4._GTF.DSSP], AE_NOT_FOUND (20240827/psargs-332)

So what we do?? We edit grub……………yaaaaaaaaay
What happens next?? Kernel Panic……. noooooooooo

I had to go grub edit mode to remove the fix coz TrueNAS did not like it lmao
We are back online.

Noobs being Noobs haha