Re: data corruption using raid0+lvm2+jfs with 2.6.0-test3

[Neil Brown <neilb@cse.unsw.edu.au>]

On Friday August 15, mfedyk@matchmail.com wrote:
> On Wed, Aug 13, 2003 at 09:05:58AM +1000, Neil Brown wrote:
> > On Tuesday August 12, akpm@osdl.org wrote:
> > > Tupshin Harper <tupshin@tupshin.com> wrote:
> > > >
> > > > raid0_make_request bug: can't convert block across chunks or bigger than 
> > > > 8k 12436792 8

> > 
> > Probably the simplest solution to this is to put in calls to
> > bio_split, which will need to be strengthed to handle multi-page bios.
> > 
> > The policy would be:
> >   "a client of a block device *should* honour the various bio size 
> >    restrictions, and may suffer performance loss if it doesn't;
> >    a block device driver *must* handle any bio it is passed, and may
> >    call bio_split to help out".
> > 
> 
> Any progress on this?

No, and I doubt there will be in a big hurry, unless I come up with an
easy way to make lvm-over-raid0 break instantly instead of eventually.

I think that for now you should assume tat lvm over raid0 (or raid0
over lvm) simply isn't supported.  As lvm (aka dm) supports striping,
it shouldn't be needed.

NeilBrown