С LiveCD загружались? Смотрели что там с разделами? корневой раздел цел? /boot (если создавался как отдельный)?
В gparted пишет partition-unallocated,file system-unallocated
sudo fdisk -l
Disk /dev/sda: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
Disk /dev/sdb: 4005 MB, 4005560320 bytes
124 heads, 62 sectors/track, 1017 cylinders
Units = cylinders of 7688 * 512 = 3936256 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 1017 3909317 b W95 FAT32
# /etc/fstab: static file system information.
#
# Use 'vol_id --uuid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# / was on /dev/sda1 during installation
UUID=385ecae6-bd34-41c3-a524-974b8cd6d17f / ext3 errors=remoun$
# swap was on /dev/sda2 during installation
UUID=c6876978-438f-4a1e-ae53-dacdf22d1e4a none swap sw $
/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto 0 0
aufs / aufs rw 0 0
tmpfs /tmp tmpfs nosuid,nodev 0 0