sub mesa :
What exactly was the error message you received? And could you check the following commands in a terminal (applications->accessories->terminal)?
ls -l /dev/sd*
ls -l /dev/md*
sudo apt-get install mdadm
mdadm --detail --scan
mount
Send the output of those commands in here; if it does not work it's possible the data on the RAID-disks is damaged.
ubuntu@ubuntu:~$ ls -l /dev/sd*
ls: cannot access /dev/sd*: No such file or directory
ubuntu@ubuntu:~$ ls -l /dev/md*
ls: cannot access /dev/md*: No such file or directory
ubuntu@ubuntu:~$ sudo apt-get install mdadm
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
postfix
Suggested packages:
procmail postfix-mysql postfix-pgsql postfix-ldap postfix-pcre sasl2-bin
resolvconf postfix-cdb
The following NEW packages will be installed:
mdadm postfix
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
E: Could not get lock /var/cache/apt/archives/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the download directory
ubuntu@ubuntu:~$ mdadm --detail --scan
The program 'mdadm' is currently not installed. You can install it by typing:
sudo apt-get install mdadm
ubuntu@ubuntu:~$ mount
aufs on / type aufs (rw)
none on /proc type proc (rw,noexec,nosuid,nodev)
none on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /dev type devtmpfs (rw,mode=0755)
none on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
/dev/sr0 on /cdrom type iso9660 (ro,noatime)
/dev/loop0 on /rofs type squashfs (ro,noatime)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
none on /dev/shm type tmpfs (rw,nosuid,nodev)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev)
none on /var/run type tmpfs (rw,nosuid,mode=0755)
none on /var/lock type tmpfs (rw,noexec,nosuid,nodev)
none on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
gvfs-fuse-daemon on /home/ubuntu/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=ubuntu)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)