Strange boot failure

[Alexey Vyskubov]

Hello,

Asking hive mind: what could I forget?

I have nda1, which I wanted to remove from the system. It has GPT
partition table:

=> 40 488397088 nda1 GPT (233G)
40 4194304 1 zfs-main-log (2.0G)
4194344 41943040 2 zefs-main-arc (20G)
46137384 8388608 3 zfs-16tb-log (4.0G)
54525992 83886080 4 zfs-16tb-arc (40G)
138412072 134217728 5 ssd-swap (64G)
272629800 215767328 6 ssd-1st-rest (103G)

I did "zpool remove zroot /dev/gpt/gfs-main-log" and
"zpool remove zroot /dev/gpt/gfs-main-arc". I edited /etc/fstab and removed
swap entry for nda1. Then I powered off the machine, removed nda1 and powered
it on again. The system went into reboot loop (the bootloader starts, I think
it starts booting the kernel, but almost immediately the system reboots). I put
nda1 back, and the system boots fine (actually I'm writing this from it).
Obviously, I forgot something. What could it be?

--
Alexey
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[Frank Leonhardt]

On 14/05/2026 18:40, Alexey Vyskubov wrote:
> Hello,
>
> Asking hive mind: what could I forget?
>
> I have nda1, which I wanted to remove from the system. It has GPT
> partition table:
>
> => 40 488397088 nda1 GPT (233G)
> 40 4194304 1 zfs-main-log (2.0G)
> 4194344 41943040 2 zefs-main-arc (20G)
> 46137384 8388608 3 zfs-16tb-log (4.0G)
> 54525992 83886080 4 zfs-16tb-arc (40G)
> 138412072 134217728 5 ssd-swap (64G)
> 272629800 215767328 6 ssd-1st-rest (103G)
>
> I did "zpool remove zroot /dev/gpt/gfs-main-log" and
> "zpool remove zroot /dev/gpt/gfs-main-arc". I edited /etc/fstab and removed
> swap entry for nda1. Then I powered off the machine, removed nda1 and powered
> it on again. The system went into reboot loop (the bootloader starts, I think
> it starts booting the kernel, but almost immediately the system reboots). I put
> nda1 back, and the system boots fine (actually I'm writing this from it).
> Obviously, I forgot something. What could it be?

Some reference to nda1 in /boot/zfs/zpool.cache perhaps? zdb -C to dump it.

Regards, Frank.