Date: Tue, 22 Nov 2022 11:42:36 -0700 From: Alan Somers <asomers@freebsd.org> To: John Kennedy <warlock@phouka.net> Cc: freebsd-fs@freebsd.org, Nathan Whitehorn <nwhitehorn@freebsd.org> Subject: Re: UEFI question Message-ID: <CAOtMX2g4-2PPTSSP-SfrG8m7gQDDqP0J%2BuwOKKutiQxryye6sw@mail.gmail.com> In-Reply-To: <YpYzbgexVa0mULas@phouka1.phouka.net> References: <20220531123221.n7ubs365ceeqo2d4@x1> <YpYzbgexVa0mULas@phouka1.phouka.net>
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On Tue, May 31, 2022 at 9:27 AM John Kennedy <warlock@phouka.net> wrote: > > On Tue, May 31, 2022 at 02:32:21PM +0200, Julien Cigar wrote: > > I have a Dell R340 server on which installed a 13.0-RELEASE and then > > upgraded to 13.1-RELEASE (through freebsd-update). ZFS is used (raidz2). > > > > The system has the following partitions: https://gist.github.com/silenius/2defdd5480c5c1bc9ba2ff8940756466 > > Some things regarding UEFI are not clear to me: > > - as you can see in the partition list, the installer created an EFI > > partition on all 4 drives, however it looks like only the first one has > > has been populated (an mounted): https://gist.github.com/silenius/1220c953f905d868c1615fd0e7122bbf .. why ? > > - if I understand well if my da0 disk dies the system becomes > > unbootable (https://gist.github.com/silenius/51d202053295270eaaeb2c02316165ee).. correct? > > - what's the correct way to fix this? should I newfs_msdos on each EFI > > partition and copy /boot/loader.efi as /EFI/BOOT/BOOTX64.EFI? or > > should I use efibootmgr? > > > > Thanks for enlightening me :) > > I use UEFI to multi-boot a lot myself, but not through efibootmgr (vs > picking it via UEFI/BIOS on boot manually). I'm multi-booting windows > and FreeBSD, so I'm being (justifiably) paranoid, but not based on > being burnt in recent memory. > > Depending on how your system works (drives are enumerated at startup), > in theory any of your disks could be da0. If you've only got a working > EFI partition on one, that is probably hedging your bets a bit but yes, > if that drive died, you'd probably be dead. > > In my dual-disk setups, I'd see an EFI and a freebsd-boot (BIOS) partition > on both disks, I split my total swap between the two (not mirrored), and > did ZFS "raiding" (mirroring-ish, usually) across the freebsd-zfs partitions. > > In my case, using the UEFI/BIOS from the motherboard, I could manually > pick a disk to boot from which let me vet UEFI or ZFS bootblock changes > for sanity before committing to both. But yes, I'd upgrade them both to > the same thing once I was sure it would work. I just noticed the same problem. For mirrored installs, the 13.1-RELEASE installer only formats the efi partition on one hard disk. Shouldn't it do both?
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