On 2/5/12 7:54 PM, Dave Chinner wrote:

On Sun, Feb 05, 2012 at 06:13:28PM -0600, Eric Sandeen wrote:

quoted

On 2/5/12 6:11 PM, Dave Chinner wrote:

quoted

On Fri, Feb 03, 2012 at 12:50:17PM -0600, Eric Sandeen wrote:

quoted

On 2/3/12 8:39 AM, Marcos Mello wrote:

quoted

Eric Sandeen <sandeen <at> sandeen.net> writes:

quoted

In general there is no problem with xfs on a root partition.  However, the

installer

quoted

may not make it easy or available for you.

(I never use xfs for /boot though, I don't trust grub enough for that

honestly).

quoted

-Eric

Same thing on Fedora 16. Let's hope some day Anaconda will change that.

F16 prevents it?  I didn't see it in the upstream tree.  That should
not be so.  :/

quoted

About GRUB with a XFS /boot the problem was with GRUB Lagacy, wasn't it?
Or GRUB2 is still buggy?

I have no idea, actually.  I delved into grub a bit, it was disturbing
enough that I have not tried to look at grub2.  :)

Certainly the problem exists with legacy grub - it assumes that it
can write to the first sector or any disk or partition which
overwrites the XFS superblock...

well, it was worse than that.  I can work around the grub-on-a-partition
problem, but what I ran into was grub reading & writing to/from the block
device under a mounted filesystem - corruption and hilarity ensued.

Oh, grub2 does worse things than that - grub_probe mounts any device
that appears to have a valid superblock so it can find out what
devices it needs to list in it's boot menu. I found this out when I
built a big DM stripe out of disks that used to have filesystems on
them.  grub-probe mounted every single device -inside- the stripe
and ran log recovery on them, corrupting the new filesystem and
quite a bit of data on the DM stripe they were part of....

Ok, your horror story wins from a pain POV ;)

but sounds like someone should have zeroed out a bit more disk
when setting up the dm stripes :(

I've always thought maybe we needed a libzero.so to zap every known signature
on disk....

-Eric

Cheers,

Dave.

_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs