sudo fdisk -l /dev/sdb

Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 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: 0x000d7078

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1              63   409609304   204804621   83  Linux
/dev/sdb2       409609305  1953520064   771955380   83  Linux