Re: [linux-lvm] LVM2 for kernels 2.4.20(another problem raid-0)

[Patrick Caulfield <caulfield@sistina.com>]

On Mon, Jan 27, 2003 at 12:19:16PM +0100, Svetoslav Slavtchev wrote:
> Quoting Patrick Caulfield <caulfield@sistina.com>:
> 
> > On Mon, Jan 27, 2003 at 12:07:28AM +0100, Svetoslav Slavtchev wrote:
> > > Hi just an intermidiate report,
> > > cause it's with 2.4.20-dm-2
> > > (i'm rebuilding now with dm-7)
> > > 
> > > when i try to mount a xfs filesystem wich is on 
> > > lv over soft raid-0, i'm getting just like in
> > > 2.5.2x - 2.5.4x (i didn't try later kernels) :
> > > 
> > > ############################
> > > raid0_make_request bug: can't convert block across chunks or bigger
> > than 16k
> > > 25181311 4
> > > raid0_make_request bug: can't convert block across chunks or bigger
> > than 16k
> > > 25181343 4
> > > ############################
> > > 
> > > is this know problem, is it fixed ?
> > > i thought that the problem exist only in 2.5 kernel
> > 
> > I seem to remember that there's some option you have to give to XFS to
> > tell it
> > to align the journal or something. you may have to search the LVM and/or
> > XFS
> > archives for it.
> > 
> > Sorry that's a bit vague but I don't use XFS but I do remember a thread
> > like
> > this some time ago.
> a google search "raid0_make_request bug" gives a lot of results
> (mainly my post on 2.5 problems)
> 
> do you mean :
> http://www.cs.helsinki.fi/linux/linux-kernel/2002-14/0127.html
> 
> it didn't help me a lot under 2.5

It should help on 2.4. There's also a parameter to the mkfs.xfs (which is what I
actually meant but which is probably harder to find!) that has a similar effect
but you probably need to recreate the FS.

Whether this "fix" helps on existing FSs I don't know. You'll probably be better
asking on the XFS lists really.

-- 

patrick