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
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