After formating from the box menu, I can not see any more the option hard disk on the menu.
from putty I can see this:
is my hdd recogniced?

root@S400:~# fdisk -l


Disk /dev/sda: 524 MB, 524869632 bytes
189 heads, 61 sectors/track, 88 cylinders, total 1025136 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: 0x000a5053


Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1023999 510976 83 Linux


Disk /dev/sdb: 4041 MB, 4041211904 bytes
64 heads, 32 sectors/track, 3854 cylinders, total 7892992 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: 0x30624145


Device Boot Start End Blocks Id System
/dev/sdb1 * 64 1327103 663520 17 Hidden HPFS/NTFS
/dev/sdb2 1329150 7890943 3280897 5 Extended
/dev/sdb5 1329152 7516159 3093504 83 Linux
/dev/sdb6 7518208 7890943 186368 82 Linux swap / Solaris