FWIW: When it says "Don't upgrade the boot pool", they are not kidding!

[ArchatParks]

So, after a recent upgrade, I ran :
"zpool status -v bootpool" and got a message like this:

pool: bootpool
state: ONLINE
status: Some supported and requested features are not enabled on the pool.
The pool can still be used, but some features are unavailable.
action: Enable all features using 'zpool upgrade'. Once this is done,
the pool may no longer be accessible by software that does not support
the features. See zpool-features(7) for details.
scan: scrub repaired 0B in 00:02:11 with 0 errors on Sat Oct 28 03:47:13 2023
config:

NAME STATE READ WRITE CKSUM
bootpool ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
sdb3 ONLINE 0 0 0
sdc3 ONLINE 0 0 0


I remember running "zpool upgrade" quite soem time ago so I did it...bad idea.

Like a dipstick, even though I saw a ton of messages saying "Don't do it" it was like thinking that a Krystal hamburger and a shot of Fireball would be a good idea even though your friends said "Don't do it!!!"...I did it anyway. Worse, it was on several machines.

I was greeted with a nice grub message and it would not boot. I ended up having to run the install from the DVD image and then restoring the config info.

Don't do it!

 

[Arwen]

Thank you for your clear and honest posting.

Grub's supported ZFS pool features will likely always be out of date. TrueNAS SCALE likely uses a direct feed of OpenZFS, while the Debian Linux distro that SCALE is based on, will likely have an older version of Grub. Thus, the dis-connect.


In other uses of ZFS, like my own home computers, using a separate "/boot" partition eliminates any Grub incompatibility with the OS side's root pool. But, it still does require "/boot" either be EXTx file system or a limited ZFS pool features.

 

[hackerman]

I did the same thing a week ago when 23.10.0 came out. I had upgraded the boot pool once or twice before, with the previous releases, and didn't have this issue. When I suddenly got this issue with this release, I first blamed it on the TrueNAS update, since I did have other issues caused by OS updates (messed up reports and apps completely gone). After looking on the forums here, I saw that simply shouldn't upgrade the boot pool, so I've learned that lesson now.

It's a good thing that TrueNAS prompts you to download a copy of your config every time you update the OS, since that's what saved my bacon. As OP stated, I just had to re-install the OS from a USB and import my config, and I was good to go. My issue with the reports being gone was also fixed, so that's good. The only actual issues with 23.10.0 that I can see currently are much higher than expected traffic speeds in the reporting and the apps service being broken. Besides that, things seem dandy.