Disk /dev/sda: 523 MB, 523837440 bytes
32 heads, 63 sectors/track, 507 cylinders
Units = cylinders of 2016 * 512 = 1032192 bytes
Disk identifier: 0x31b7e20b

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1           6        6016+  83  Linux
/dev/sda3               7          17       11088   83  Linux
/dev/sda4              18         253      237888   83  Linux