[Bug 264450] ufs: Partition recognized on 12.3 not recognized on CURRENT (2573e6ced996): Cannot find file system superblock .. Invalid fstype: Invalid argument

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264450

--- Comment #32 from slb@sonnet.com ---
(In reply to Kirk McKusick from comment #31)
I built the stable/13 commits against 13.3.  Still wouldn't mount with:

test# mount -o ro /dev/md0s1a /mnt
UFS1 superblock failed: fs->fs_old_cpg (89) != 1 (1)
mount: /dev/md0s1a: Invalid fstype: Invalid argument


Deleted line 395 of ffs_subr.c, rebuilt, and it mounted.

However, there also seem to be some different fsck tests versus 14:

# fsck /dev/md0s1a
UFS1 superblock failed: fs->fs_old_cpg (89) != 1 (1)
UFS1 superblock failed: fs->fs_old_spc (4096) != fs->fs_fpg * fs->fs_old_nspf
(364544)
UFS1 superblock failed: fs->fs_old_ncyl (1885) != fs->fs_ncg (22)
Cannot find file system superblock
UFS1 superblock failed: fs->fs_old_cpg (89) != 1 (1)
UFS1 superblock failed: fs->fs_old_spc (4096) != fs->fs_fpg * fs->fs_old_nspf
(364544)
UFS1 superblock failed: fs->fs_old_ncyl (1885) != fs->fs_ncg (22)
Cannot find file system superblock

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