[dm-devel] Re: BUG: Files corrupt after moving LVM volume to USB disk

[Milan Broz]

Marti Raudsepp wrote:
> This is a reproducible demonstration of the problem initially reported in my
> first e-mail, titled "PROBLEM: 'bio too big device' after moving to a USB
> disk" (http://lkml.org/lkml/2007/3/7/657)
...
> 06. Observe "bio too big device dm-0 (256 > 240)" messages in dmesg
> 
> [non]# dmesg |tail -n7
> [101403.106825] bio too big device dm-0 (256 > 240)
> [101403.115228] bio too big device dm-0 (256 > 240)
> [101403.115912] bio too big device dm-0 (256 > 240)
> [101403.130529] bio too big device dm-0 (256 > 240)
> [101403.131220] bio too big device dm-0 (256 > 240)
> [101403.141577] bio too big device dm-0 (256 > 240)
> [101403.142255] bio too big device dm-0 (256 > 240)

if (unlikely(bio_sectors(bio) > q->max_hw_sectors)) {
	printk("bio too big device %s (%u > %u)\n", 
...

Please could you try if this patch helps ?
http://www.kernel.org/pub/linux/kernel/people/agk/patches/2.6/editing/dm-merge-max_hw_sector.patch


Milan
--
mbroz at redhat.com