Re: lvm2 and e2fsck

[Mark Allums <mark@allums.com>]

Ron Johnson wrote:
> On 02/22/2009 08:38 PM, Mark Allums wrote:
> > Ron Johnson wrote:
> > > Hi,
> > >
> > > # mount -v -t ext4 /dev/main_huge_vg/main_huge_lv /data/big
> > >
> > > $ dmesg | tail -n2
> > > EXT4-fs: ext4_check_descriptors: Block bitmap for group 0 not in 
> > > group (block 3120627712)!
> > > EXT4-fs: group descriptors corrupted!
> > >
> > >
> > > Can I just do this?
> > > # e2fsck /dev/main_huge_vg/main_huge_lv
> >
> > You know the usual rules about fsck'ing a mounted file system?
>
> Yup...
>
> > ext4 reduces to ext3, or even ext2 as long as you haven't use extents 
> > (and the journal's reasonably clean).
>
> Yep.
>
> > So yes.
>
> That's what I thought.
>
> > Haven't they added ext4 to the fsprogs?  Is there not a fsck.ext4?
>
> Hmmm...
>
> http://www.mail-archive.com/linux-ext4@vger.kernel.org/msg04690.html


#fsck.ext4 /dev/sda2
e2fsck 1.41.3 (12-Oct-2008)
fsck.ext4: No such file or directory while trying to open /dev/sda2



....

I think my mixed Etch/Lenny/Squeeze/Sid/Experimental abomination of a 
system has had the ext4 fsck capability for quite some time. [0]


Mark Allums


0. I have lvm2 running on top of Linux md RAID, and don't actually have 
any ext4 file sytem partitions to check, so that particular fsck command 
was destined to fail.  But it shows it's there, when it's needed.