sudo fdisk -l /dev/sdb 

Disk /dev/sdb: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xcd421216

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1       60801   488384001    5  Extended