Disk /dev/sda: 64.0 GB, 64023257088 bytes
255 heads, 63 sectors/track, 7783 cylinders, total 125045424 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000350de
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 411647 204800 83 Linux
/dev/sda2 17188864 125045423 53928280 83 Linux
/dev/sda3 411648 17188863 8388608 83 Linux
Partition table entries are not in disk order
Disk /dev/sdb: 15.8 GB, 15806234624 bytes
64 heads, 32 sectors/track, 15074 cylinders, total 30871552 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x20ac7dda
This doesn't look like a partition table
Probably you selected the wrong device.
Device Boot Start End Blocks Id System
/dev/sdb1 ? 3224498923 3657370039 216435558+ 7 HPFS/NTFS/exFAT
/dev/sdb2 ? 3272020941 5225480974 976730017 16 Hidden FAT16
/dev/sdb3 ? 0 0 0 6f Unknown
/dev/sdb4 50200576 974536369 462167897 0 Empty
Partition table entries are not in disk order