Looks like this is still an issue in Precise (see below). You can find the most recent version of that image at http://m0n0.ch/wall/downloads.php (get the generic-pc-1.33.img). I can't judge about Quantal.
----8<---- root@slpn-nb-mss:~/Work/m0n0# kpartx -d -v generic-pc-1.33.img loop deleted : /dev/loop0 root@slpn-nb-mss:~/Work/m0n0# kpartx -a -v generic-pc-1.33.img device-mapper: resume ioctl failed: Invalid argument create/reload failed on loop0p4 add map loop0p4 (0:0): 0 50000 linear /dev/loop0 0 root@slpn-nb-mss:~/Work/m0n0# dmesg | grep loop0 [ 3041.671498] device-mapper: table: 252:9: loop0 too small for target: start=0, len=50000, dev_size=20480 ----8<---- ** Changed in: multipath-tools (Ubuntu Precise) Status: Fix Released => Triaged -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to multipath-tools in Ubuntu. https://bugs.launchpad.net/bugs/605436 Title: kpartx fails to map partitions (device-mapper: resume ioctl failed: Invalid argument) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/605436/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs