Messages in this thread | | | Date | Tue, 22 Feb 2005 20:01:49 +0100 | From | <pcg( Marc)@goof(A.).(Lehmann )com> | Subject | Re: Odd data corruption problem with LVM/ReiserFS |
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On Mon, Feb 21, 2005 at 12:37:53PM +0100, Andreas Steinmetz <ast@domdv.de> wrote: > >Anyway, what do you guys think could be the problem? Could it be that > >the LVM / Device Mapper snapshot feature is solely responsible for > >this corruption? (I'm sure there's a reason it's marked > >Experimental). > > I don't think so - I changed from reiserfs to ext3 without changing the > underlying dm/raid5 and this seems to work properly.
I use both reiserfs and ext3 on lvm/dm on raid.
Both filesystems have issues when restoring from backup (i.e. very heavy write activity).
I did report this to the linux kernel, and got as reply that there are indeed races *somewhere*, but as of yet there is no fix.
The symptoms are _not_ I/O errors (but until I see logs I wouldn't believe you that there are real I/O errors), but usually too-high block numbers.
A reboot fixes this for both ext3 and reiserfs (i.e. the error is gone).
You might want to explore this problem and decide for yourself if it's caused by I/O errors (in which case you have a disk problem) or "just" filesystem corruption.
-- The choice of a -----==- _GNU_ ----==-- _ generation Marc Lehmann ---==---(_)__ __ ____ __ pcg@goof.com --==---/ / _ \/ // /\ \/ / http://schmorp.de/ -=====/_/_//_/\_,_/ /_/\_\ XX11-RIPE - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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