Truenas won't boot without manually importing boot-pool after update to 25.10.3

TrueNAS General
1

Should anyone have any clues how i’d go about solving the root cause of this error

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It started happening after the update to 25.10.3 from 25.10.2.1 , if i manually import the boot-pool, it boots, but only once.

I’m trying to figure out to make it reboot to the new version without this error.

IF i switch back to my old version 25.10.2.1 , i have no boot issues at all?
It might be important tot note that SDE is a USB attached NVMe drive

i tried reinstalling the 25.10.3 update using the web UI, but that didn’t appear to have fixed the booting issue

root@truenas[~]# zpool status boot-pool
pool: boot-pool
state: ONLINE
status: One or more features are enabled on the pool despite not being
requested by the ‘compatibility’ property.
action: Consider setting ‘compatibility’ to an appropriate value, or
adding needed features to the relevant file in
/etc/zfs/compatibility.d or /usr/share/zfs/compatibility.d.
scan: scrub repaired 0B in 00:09:01 with 0 errors on Thu Apr  9 03:54:03 2026
config:

    NAME        STATE     READ WRITE CKSUM
    boot-pool   ONLINE       0     0     0
      sde2      ONLINE       0     0     0

errors: No known data errors

root@truenas[~]# lsblk -f
NAME        FSTYPE            FSVER LABEL     UUID                                 FSAVAIL FSUSE% MOUNTPOINTS
loop1       squashfs          4.0
sda
├─sda1      linux_raid_member 1.2   swap0     f104c48f-12d3-965e-3dd9-0589ce89f963
└─sda2      zfs_member        5000  ssdxl     6159281286513869433
sdb
├─sdb1      linux_raid_member 1.2   swap1     309cc15a-d1f8-7ace-5c16-f2b81fa8df95
└─sdb2      zfs_member        5000  ssdxl     6159281286513869433
sdc
├─sdc1      linux_raid_member 1.2   swap0     f104c48f-12d3-965e-3dd9-0589ce89f963
└─sdc2      zfs_member        5000  ssdxl     6159281286513869433
sdd
├─sdd1      linux_raid_member 1.2   swap1     309cc15a-d1f8-7ace-5c16-f2b81fa8df95
└─sdd2      zfs_member        5000  ssdxl     6159281286513869433
sde
├─sde1
└─sde2      zfs_member        5000  boot-pool 12337834706996266549
zd0
nvme0n1
├─nvme0n1p1 linux_raid_member 1.2   swap1     309cc15a-d1f8-7ace-5c16-f2b81fa8df95
└─nvme0n1p2 zfs_member        5000  ssdxl     6159281286513869433
nvme1n1
├─nvme1n1p1 linux_raid_member 1.2   swap0     f104c48f-12d3-965e-3dd9-0589ce89f963
└─nvme1n1p2 zfs_member        5000  ssdxl     6159281286513869433
2

I wonder whether this fix had a side effect

  • Fixes pool creation errors on systems with a USB boot drive or other disk with a duplicate serial number (NAS-139947). The disk availability check incorrectly blocked pool creation if any disk on the system had a duplicate serial number, even when that disk was unrelated to the new pool. USB boot drives commonly have blank or duplicate serial numbers and were the most frequent cause. Note that TrueNAS does not recommend USB boot devices. Installing on SATA, SAS, or NVMe flash media is recommended.
3

it’s unclear if it’s related, and it’s also unclear how to fix it.
I’m considering exporting configuration and reinstalling hoping that will fix it, but that’s just desperate attempts at getting it to work :slight_smile:

4

Are you booting UEFI? Try going into the UEFI boot menus and see if you can prune out the listed entries. There was a problem with the space for entries filling up on some firmware. The actual boot pool has plenty of space but there is no more room for boot entries in the UEFI firmware. There should be a JIRA ticket related but it may take a bit to find it.