Public bug reported: I have 2 x 1TB SSD, each with 32G ext4 and about 900G btrfs in RAID1 configuration. The two ext4 partitions hold mirror image installations of Ubuntu Server 20.04, intended as failovers to each other. The only difference is that one has ea_inode and encrypt options while the other does not. On the drive with these options grub-mkconfig fails with unknown file system (in grub-probe) and attempting to re-boot fails, dropping into grub recovery. This happens on both drives, if the options are enabled, but boots normally without them.
Noticed the problem after an update to the kernel which, of course, attempted to update grub.cnf, and also when I attempted to grub-install on the drive with the options. Knowing of a similar problem in os-probe about two years ago, I suspect grub-probe is not recognizing these options in the file system itself, and therefore not recognizing an ext4 file system. I actually need these features . . . ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: grub2 (not installed) ProcVersionSignature: Ubuntu 5.4.0-54.60-generic 5.4.65 Uname: Linux 5.4.0-54-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.13 Architecture: amd64 CasperMD5CheckResult: skip Date: Wed Dec 2 13:42:40 2020 ProcEnviron: SHELL=/bin/bash LANG=en_US.UTF-8 TERM=xterm-256color PATH=(custom, no user) SourcePackage: grub2 UpgradeStatus: Upgraded to focal on 2020-07-29 (126 days ago) ** Affects: grub2 (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug focal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1906561 Title: grub-probe fails to recognize valid EXT4 partition To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1906561/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs