Command (m for help): p
 Disk /dev/sdb: 255 heads, 63 sectors, 2231 cylinders
Units = cylinders of 16065 * 512 bytes
    Device Boot    Start       End    Blocks   Id  System
/dev/sdb1   *         1      1045   8393931   83  Linux
/dev/sdb3          1046      1555   4096575   83  Linux
  Command (m for help): w
The partition table has been altered!
 Calling ioctl() to re-read partition table.
Syncing disks.
Re-read table failed with error 16: Device or resource busy.
Reboot your system to ensure the partition table is updated.
 WARNING: If you have created or modified any DOS 6.x
partitions, please see the fdisk manual page for additional
information.