First, try searching the LVM2 archives or the LVM HOWTO for a solution. If you suspect a problem with device mapper, you may also want to try searching the dm-devel archives. If you can't find anything, report your problem to the LVM general discussion and development list, email@example.com, and if device mapper is suspected, CC the device-mapper development list, firstname.lastname@example.org. In addition, please run the lvm_dump.sh script (new as of Oct 5, 2006) and post a link to the resulting tarball. (NOTE: If you are using dm-crypt, you should edit the tarball and remove the password before posting a link to it.) If your copy of LVM2 does not have this script, click here.