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Disk /dev/sda: 20.0 GB, 20020396032 bytes
255 heads, 63 sectors/track, 2434 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: 0xa834a834

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1         408     3277228+   7  HPFS/NTFS
/dev/sda2             409        2434    16273814+   5  Extended
/dev/sda5             409        2343    15542856   83  Linux
/dev/sda6            2344        2434      730926   82  Linux swap / Solaris

Disk /dev/sdb: 67 MB, 67108864 bytes
3 heads, 43 sectors/track, 1016 cylinders
Units = cylinders of 129 * 512 = 66048 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/sdb doesn't contain a valid partition table