[prev in list] [next in list] [prev in thread] [next in thread] 

List:       debian-user
Subject:    Re: grub update and reinstallation
From:       "D. R. Evans" <doc.evans () gmail ! com>
Date:       2020-08-03 16:18:05
Message-ID: 713f84e0-ac20-4478-56b2-45c8ada4f7f9 () gmail ! com
[Download RAW message or body]

[Attachment #2 (multipart/mixed)]


Tom Dial wrote on 8/1/20 9:31 PM:

> 
> My experience, now on eight machines, indicates that it should be if the
> installed, configured, and used versions of grub components is
> 
> 2.02+dfsg1-20+deb10u2.
> 
> I could be wrong, but here it has been the case for both UEFI (and root
> on ZFS) and legacy boot setups, on both i386 and amd64. The only
> exception is one root-on-ZFS VM that was slightly broken beforehand and
> declines to boot for reasons I am fairly sure are unrelated to grub
> installation.
> 

So if one has two bootable drives (call them A and B), will this update update
the MBR on both A and B, not just the one that happened to have been used for
the most recent boot?

I ask because I have a couple of root-on-ZFS BIOS-boot machines that are both
configured as two-disk mirrors and I want to be sure that, following this
upgrade, I can still boot off either of the two disks (as I can at the moment)
without having to perform any manual changes.

The use case is, if it's not obvious, that if under normal circumstances disk
A is used for booting, but then at some point A fails (so ZFS is running in a
degraded state) I can still boot from drive B if necessary.

  Doc

-- 
Web:  http://enginehousebooks.com/drevans


["signature.asc" (application/pgp-signature)]

[prev in list] [next in list] [prev in thread] [next in thread]