[root@OpenWrt /root]# fdisk -l

Disk /dev/sda: 128 MB, 128188416 bytes
16 heads, 63 sectors/track, 248 cylinders, total 250368 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: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *          63        9071        4504+  83  Linux
/dev/sda2            9135      107855       49360+  83  Linux

Disk /dev/sdb: 200.0 GB, 200048565760 bytes
255 heads, 63 sectors/track, 24321 cylinders, total 390719855 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: 0x73b6f8b7

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1              63   390719854   195359896   83  Linux
[root@OpenWrt /root]# mount /dev/sdb1 /mnt/hdd0/
NTFS signature is missing.
Failed to mount '/dev/sdb1': Invalid argument
The device '/dev/sdb1' doesn't seem to have a valid NTFS.
Maybe the wrong device is used? Or the whole disk instead of a
partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
mount: mounting /dev/sdb1 on /mnt/hdd0/ failed: Invalid argument