Comment 2 for bug 316607

I have the same problem with swap and cryptsetup.

Furthermore it's the same problem with the "tmp" option. Thus I guess it's related.

root@hubble:/home# /etc/init.d/cryptdisks start
 * Starting remaining crypto disks... * tmp (starting)
 * tmp: the precheck for '/dev/mapper/sil_ajabbgcfcdah5' failed: - The device /dev/mapper/sil_ajabbgcfcdah5 contains a valid filesystem type unknown or non-unique volume type (--probe-all lists possibly conflicting types).
 * tmp (failed)... [ OK ]

/etc/crypttab:

# <target name> <source device> <key file> <options>
swap /dev/mapper/sil_ajabbgcfcdah3 /dev/urandom swap
tmp /dev/mapper/sil_ajabbgcfcdah5 /dev/urandom tmp=xfs

root@hubble:/home# fdisk -l /dev/mapper/sil_ajabbgcfcdah

Disk /dev/mapper/sil_ajabbgcfcdah: 400.0 GB, 400087408640 bytes
255 heads, 63 sectors/track, 48641 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x0003cf0b

                       Device Boot Start End Blocks Id System
/dev/mapper/sil_ajabbgcfcdah1 1 122 979933+ 83 Linux
/dev/mapper/sil_ajabbgcfcdah2 123 4985 39062047+ 83 Linux
/dev/mapper/sil_ajabbgcfcdah3 4986 6230 10000462+ 83 Linux
/dev/mapper/sil_ajabbgcfcdah4 6231 48641 340666357+ 5 Extended
/dev/mapper/sil_ajabbgcfcdah5 6231 7475 10000431 83 Linux
/dev/mapper/sil_ajabbgcfcdah6 7476 48641 330665863+ 83 Linux

Setup:
- Mythbuntu Jaunty
- Linux hubble 2.6.28-4-generic #9-Ubuntu SMP Tue Jan 6 19:34:01 UTC 2009 i686 GNU/Linux
- cryptsetup 2:1.0.6-7ubuntu1