Ubuntu Servers :: Starting Degraded Raid 5 Array?

so my servers 7 hds in raid 5 all was working well until one of them died. The HD that died sort of works it can read like half a file also freezes on the benchmark test in disk utility. Unfortunate when i take it out on boot it says. The drive for /media_kbt is not ready or present press s to skip or m for manual recovery. I hit s and then go to disk utility. But i can't start or add disks to the array.

Here is me trying to do random stuff

Code:
administrator@3dslice-host:~$ sudo mdadm --stop /dev/md0
[sudo] password for administrator:
mdadm: metadata format 00.90 unknown, ignored.
mdadm: stopped /dev/md0
administrator@3dslice-host:~$ sudo mdadm --add /dev/md0 /dev/sda1
mdadm: metadata format 00.90 unknown, ignored.

[Code]...