ext4 disaster

[drago01]

On Sat, Jun 13, 2009 at 10:40 PM, Neal Becker<ndbecker2 at gmail.com> wrote:
> drago01 wrote:
>
>> On Sat, Jun 13, 2009 at 1:21 PM, Neal Becker<ndbecker2 at gmail.com> wrote:
>>> Greg wrote:
>>>
>>>> On 13/06/2009 6:30 PM, Bob Gustafson wrote:
>>>>> As I recall, I think F11 is set up to use only ext3 on /boot.
>>>>> Something about anaconda or the kernel not accepting ext4 - yet. Check
>>>>> the documentation on this point.
>>>> it was Grub, didnt have enough time to put the patch into it
>>>>
>>>
>>> It's not /boot.  I used a separate /boot ext3 partition.  It's not a grub
>>> issue.  Problem seems to be that mkinitrd did not add ext4 support.
>>
>> It does not have to:
>>
>> CONFIG_EXT4_FS=y
>>
>> ext4 is not built as a module but built into the kernel, so mkinitrd
>> does not have to do anything here.
>>
> Then I'm completely baffled.  I could boot off the dvd in rescue mode, and
> it mounted OK.  Booting off the hard disk started the kernel, then said it
> couldn't mount root because the filesystem used unsupported features.
>
> The first time I did an F10->F11 upgrade.  It worked, but did not migrate to
> ext4, so I used tunefs to turn on extents.  As soon as I did that, it would
> not mount.
>
> Then I did a clean re-install, requesting ext4.  It did exactly the same
> thing again.

OK, I managed to reproduce this the problem seems not to be the
presens of the kernel module but something in the initramfs trys to
mount with -t ext3 (rebuilding the initrd fixes that because it picks
up whatever is in fstab).