Re: Heads up on ext4 changes

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Tom London wrote:
> On Fri, Oct 10, 2008 at 12:10 PM, Eric Sandeen <sandeen@xxxxxxxxxx> wrote:
>> Eric Sandeen wrote:
>>
>>> Changing /etc/fstab to list "ext4" for the root fs may be enough, do it
>>> before you install the new kernel.
>> On further reflection, you will probably just have to do this.
>>
>> -Eric
>>
>>> notting suggested a module alias to ext4dev in the ext4.ko module
>>> itself, that sounds like a good plan and as long as it gets upstream
>>> I'll commit it to Fedora shortly, and I think that should make it all
>>> seamless.
>>
> I have an 'ext4' FS on a USB hard drive.  When I plug this in, I get a
> "Cannot mount volume" popup:
> 
> The volume 'Backup1' uses the ext4dev file system which is not
> supported by your system, followed by a dbus-type failure error
> message about a minute later.
> 
> This just me, or what additional changes are needed?

Do you have the most recent e2fsprogs?  And/or what does blkid
/dev/whatever say... if it says ext4dev, try newer e2fsprogs - blkid had
a bug that caused it to say "ext4dev" when "ext4" is what we wanted.

Going forward I think we'll register both ext4 & ext4dev from the ext4
kernel module, at least for a while, so that "mount -t ext4dev" will
work still work in the transition period.

Sorry for all the hassle :)

-Eric

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