Re: 2.4.20-rc1 dirty ext2 mount error

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Keith Owens wrote:
>
> The root partition was originally ext3. fstab now contains
>
> /dev/sda1 / ext2 defaults 1 1
>
> Booting 2.4.20-rc1 (ext3 as a module, not loaded yet) with a dirty / gets
>
> EXT2-fs: sd(8,1): couldn't mount because of unsupported optional features (4).
> Drop back to 2.4.18 and it works, automatically running fsck.ext2 -a /dev/sda1.
>

You sure? That would be a bug in 2.4.18...

ext2 does not know how to mount a needs-recovery ext3 filesystem. It
is flagged as an incompatible feature (4 -> EXT3_FEATURE_INCOMPAT_RECOVER).

If you run journal replay by mounting it with ext3 or running fsck across
it, then ext2 can mount it.
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