[linux-lvm] Issues with md RAID-1, LVM2 and snapshots

[Marc Cousin]

Hi,

I'm reposting the following email as I answered a 3 month old one (maybe a bad 
idea).

The problem is that I cannot snapshot when using software raid1, with lvm2. I 
only tested it in a Xen Domain0, but I can try to reproduce it without Xen, 
should anyone tell me my problem is not allready known

Setup :
Raid1(md)+LVM2 (2.6.11, Xen Domain0), 
can't snapshot correctly.

In dmesg, I've got :
attempt to access beyond end of device
dm-30: rw=0, want=1905355624, limit=1228800
attempt to access beyond end of device
dm-30: rw=0, want=1905357216, limit=1228800
attempt to access beyond end of device
dm-30: rw=0, want=8390664, limit=1228800

As soon as I remove the Raid1, the problem disappears.

Is it a known problem ? Is there a workaround ?