Source: rescue Version: 1.85 Severity: important I've installed a system using btrfs for the root filesystem with d-i (with disk encryption as well). As grub wasn't properly installed (not registered with EFI), I tried to use the rescue mode to reinstall grub.
However, mounting the root filesystem failed: /target contained only a "@rootfs" subdirectory. So running a shell in the target fs failed. Manually mounting the filesystem with `-o subvol=@rootfs` worked. This was with Debian 11.4. Ansgar