ext4 disaster
Bill McGonigle
bill at bfccomputing.com
Fri Jun 12 17:18:20 UTC 2009
On 06/12/2009 06:28 AM, Neal Becker wrote:
> On reboot, the kernel would not mount root,
> saying it was using unsupported features!!
as others have mentioned, probably you don't have the right modules or
settings in your initrd. Does fstab say 'ext4'?
> I tried fixing with tune2fs, but
> tune2fs refuses to turn off extents.
tune2fs is just flipping a flag here, right? So, probably once you have
extents on a disk it's not possible to turn it off with tune2fs, as a
safety measure. ext4 is available in either flavor, but once you go
with extents you lose ext3 compatibility, IIRC. If your initrd was
trying to mount / as ext3 this would make some sense about what you're
seeing.
> I did a clean install of F11 from scratch, choosing default ext4. Rebooted,
> and guess what? Same thing!
Did you reformat as well as reinstall? Did the initrd get recreated
(date stamp)?
> Big question: why did anaconda mount ext4 fine, but when I try to boot off
> my hard disk the (same kernel) won't?
It could be that anaconda does detection but your initrd is hard-coded.
This might be another case where a bigger, auto-detecting initrd would
help.
-Bill
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