root@vikashruhil-Inspiron-1440:~# sudo fdisk /dev/sda6
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x884d88dd.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.

Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

Command (m for help): p

Disk /dev/sda6: 41.9 GB, 41941991424 bytes
255 heads, 63 sectors/track, 5099 cylinders, total 81917952 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: 0x884d88dd

     Device Boot      Start         End      Blocks   Id  System

Command (m for help): q