On Wed, 2024-01-10 at 10:06 -0800, Darrick J. Wong wrote: > > Huh. Do you remember the exact command that was used to format this > filesystem? I do not. It was created quite a while ago. > "mke2fs" still formats ext2 filesystems unless you pass > -T ext4 or call its cousin mkfs.ext4. I wonder if that's what I did perhaps. > Nope. ext4 is really just ext2 plus a bunch of new features > (journal, > extents, uninit_bg, dir_index). Yes, that's completely understood. I would have thought it an interesting "safety" measure to flag that when a user requests an ext4 mount and the file system is actually only ext2 that a refusal to mount would indicate to the user that their ext* file system does not have the required features to be called ext4. Cheers, b.
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