DM 800SE(Clone) Festplatte(extern) kein Einhängepunkt! seltsames Problem NN2

root@dm800se:~# mkfs.ext3 /dev/sda1
mke2fs 1.41.9 (22-Aug-2009)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
109977600 inodes, 439897145 blocks
21994857 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=0
13425 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks: 
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
        4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 
        102400000, 214990848


Writing inode tables: done                            
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: 
Warning, had trouble writing out superblocks.done


This filesystem will be automatically checked every 25 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.

root@dm800se:~# tune2fs -L hdd /dev/sda1
tune2fs 1.41.9 (22-Aug-2009)
tune2fs: Bad magic number in super-block while trying to open /dev/sda1
Couldn't find valid filesystem superblock.

root@dm800se:~# mount
rootfs on / type rootfs (rw)
/dev/root on / type jffs2 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
udev on /dev type tmpfs (rw)
devpts on /dev/pts type devpts (rw)
usbfs on /proc/bus/usb type usbfs (rw)
/dev/mtdblock2 on /boot type jffs2 (ro)
tmpfs on /var type tmpfs (rw)
tmpfs on /tmp type tmpfs (rw)
automount(pid868) on /autofs type autofs (rw,fd=4,pgrp=868,timeout=5,minproto=2,maxproto=4,indirect)