fdisk -l /dev/sdb

Disk /dev/sdb: 30.0 GB, 30000660480 bytes
64 heads, 32 sectors/track, 28610 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1          33       33776    0  Empty
/dev/sdb2              34       28610    29262848    b  W95 FAT32


./ipodpatcher /dev/sdb
ipodpatcher v0.9 with v1.0 bootloaders - (C) Dave Chapman 2006-2007
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[INFO] Reading partition table from /dev/sdb
[INFO] Sector size is 512 bytes
[ERR]  Drive is not an iPod, aborting