Date: Sat, 12 Jul 2025 17:15:04 +0000 From: bugzilla-noreply@freebsd.org To: sysinstall@FreeBSD.org Subject: [Bug 287904] Most recent installer fails to flush pre-existing GPT labels Message-ID: <bug-287904-8135-W2aL1k1OWC@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-287904-8135@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=287904 John Baldwin <jhb@FreeBSD.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |imp@FreeBSD.org --- Comment #8 from John Baldwin <jhb@FreeBSD.org> --- (In reply to Dennis Clarke from comment #7) I realize you _can_ use gmirror with an EFI partition, but gmirror scribbles data in the end of the disk partition to do that, and EFI firmware is not aware of that metadata and may 1) reject the EFI FS entirely if it is too picky as it may not consider it a valid EFI FS (since it must assume that the _entire_ MBR slice is a valid EFI filesystem) or 2) while it may happen to read ok, if you use the EFI shell to do any writes to the EFI partition, it will not update the mirror, and may end up overwriting the gmirror label at the end. For these reasons, while it might be _possible_ to manually gmirror your EFI partitions, I do not think it is wise. I'm also not aware of it being a supported configuration. However, the real question I have is when were the EFI partitions mirrored? Did the installer setup the gmirror or did you do it manually? If the installer did it, then it is a bug in the installer that it doesn't use the right device in /etc/fstab. If you did it manually, then in addition to using gmirror to create the mirror between the slices, you also have to manually fix the new /etc/fstab before rebooting (and that's part of the price of running a non-standard configuration). -- You are receiving this mail because: You are the assignee for the bug.home | help
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