possible to revert to core 13u4 from scale?

[Vertigo 7]

if I've backed up my core config, is there any reason I can't revert to core by formatting the boot pool and reinstalling/restoring from backup? There are some thing I want to look at in scale but I don't want to attempt the migration if I'm screwed because expectations of scale don't meet capability. My data pools are all whatever the current ZFS revision is for core 13u4.

 

[sretalla]

Why wouldn't you just boot back to the core boot environment?

Just make sure you avoid the temptation to upgrade pools while in SCALE.

 

[Vertigo 7]

i thought that wasn't possible due to changes in grub?

 

[sretalla]

Well, now you made me test it...

When I upgrade a test VM, I see the boot menu starts with 2 items: TrueNAS SCALE (default) and TrueNAS CORE.

The GRUB boot menu comes after that.

And when booted into SCALE, I can go to the boot menu and select the old CORE boot environment and activate it... then reboot...

And there I have it: CORE.

 

[Vertigo 7]

right i see the same as well but i recall reading some other posts that core fails to boot after grub is updated with scale.

 

[sretalla]

As edited above, tested with success... upgrade, set boot environment back, reboot, CORE works.

 

[Vertigo 7]

well that's promising. saves me a few steps if i have to revert.

 

[sretalla]

I did/could not test further upgrading SCALE after the initial upgrade, so maybe the reports you're talking about refer to that somehow wiping out the initial rollback option after a subsequent upgrade to SCALE, but I'm not sure how that would look as it seems SCALE operates behind that initial boot selector.

 

[Vertigo 7]

well hopefully i don't have to roll back. trying to get around some of the frankly dumb networking limitations in docker...

 

[sretalla]

Best of luck with it.