[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

slb@sonnet.com changed:

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--- Comment #21 from slb@sonnet.com ---
Created attachment 248471
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=248471&action=edit
First megabyte of da0s1a within the MBR+BSD image

I have a similar issue with old filesystem that loads on FreeBSD 9.x, but does
not load on 13.2 or 14.0.
I have attached a first MB of the UFS in the MBR+BSD label partitioned drive. 
This was originally set up on FreeBSD 4.x, and it might be CHS?  I redacted s1
after first 16s thru the 'swap'/s1b and first two sectors of the UFS which
contained user data, so if this img appears unusable, I messed something up. 
(I believe this drive had latent data at the time of creation, which may
explain some of that user data)

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)

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