ядро 2.6.26 собрано с...
CONFIG_SUN_PARTITION=y
CONFIG_SOLARIS_X86_PARTITION=y
CONFIG_UFS_FS=y
CONFIG_UFS_FS_WRITE=y
CONFIG_UFS_DEBUG=y
геометрия...
# fdisk -l /dev/sdb1

Disk /dev/sdb1: 74.3 GB, 74340080640 bytes
255 heads, 63 sectors/track, 9038 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

     Device Boot      Start         End      Blocks   Id  System
/dev/sdb1p1   *           2        9039    72597735   bf  Solaris

пробовал по разному мотировать, вот что вышло...
Jul 25 22:09:04 debian kernel: >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
Jul 25 22:09:04 debian kernel: UFSD (fs/ufs/super.c, 746): ufs_fill_super:ufstype=old
Jul 25 22:09:04 debian kernel: ufs_read_super: bad magic number
Jul 25 22:09:04 debian kernel: UFSD (fs/ufs/super.c, 1101): ufs_fill_super:EXIT (FAILED)
Jul 25 22:09:30 debian kernel: UFSD (fs/ufs/super.c, 644): ufs_fill_super:ENTER
Jul 25 22:09:30 debian kernel: UFSD (fs/ufs/super.c, 651): ufs_fill_super:flag 1
Jul 25 22:09:30 debian kernel: UFSD (fs/ufs/super.c, 335): ufs_parse_options:ENTER
Jul 25 22:09:30 debian kernel: UFSD (fs/ufs/super.c, 701): ufs_fill_super:ufstype=ufs2
Jul 25 22:09:30 debian kernel: ufs_read_super: bad magic number
Jul 25 22:09:30 debian kernel: UFSD (fs/ufs/super.c, 1101): ufs_fill_super:EXIT (FAILED)
Jul 25 22:09:38 debian kernel: UFSD (fs/ufs/super.c, 644): ufs_fill_super:ENTER
Jul 25 22:09:38 debian kernel: UFSD (fs/ufs/super.c, 651): ufs_fill_super:flag 1
Jul 25 22:09:38 debian kernel: UFSD (fs/ufs/super.c, 335): ufs_parse_options:ENTER
Jul 25 22:09:38 debian kernel: UFSD (fs/ufs/super.c, 735): ufs_fill_super:ufstype=sunx86