For me the issue vanished with linux-image-2.6.31-4-generic (2.6.31-4.22).
During boot there are still these warnings:
Jul 25 12:29:16 vrock kernel: [ 9.259545] device-mapper: table: 252:6: sda too small for target
Jul 25 12:29:16 vrock kernel: [ 9.259547] device-mapper: table: 252:6: sdb too small for target
Jul 25 12:29:16 vrock kernel: [ 9.278195] device-mapper: table: 252:6: sda too small for target
Jul 25 12:29:16 vrock kernel: [ 9.278197] device-mapper: table: 252:6: sdb too small for target
but the boot process doesn't halt anymore after printing these warnings and the system boots up fine.
For me the issue vanished with linux-image- 2.6.31- 4-generic (2.6.31-4.22).
During boot there are still these warnings:
Jul 25 12:29:16 vrock kernel: [ 9.259545] device-mapper: table: 252:6: sda too small for target
Jul 25 12:29:16 vrock kernel: [ 9.259547] device-mapper: table: 252:6: sdb too small for target
Jul 25 12:29:16 vrock kernel: [ 9.278195] device-mapper: table: 252:6: sda too small for target
Jul 25 12:29:16 vrock kernel: [ 9.278197] device-mapper: table: 252:6: sdb too small for target
but the boot process doesn't halt anymore after printing these warnings and the system boots up fine.