Server Dell PowerEdge R320 with two 1TB disks in RAID1 (mirror) had one of it's disks failed - the primary disk (disk0). The RAID is configured on the Smart Array. The OS running on the server is CentOS 6.6 However, after power failure, the server rebooted and the full OS was unable to load. It starts loading the OS, but it stops at "Mounting Filesystem". Stays for over an hour that way with no success or suggestion to move further.
What I did to check on things:
Tried removing each disk separately - with disk1 the server does not load at all; with disk0 - loads as mentioned above.
Tried booting from CentOS installation DVD and then
fsck -f /dev/sda, but it returns that the disk is in use and the operation cannot be performed.
I also read for rescue mode, but I was unable to run it.
Any help/suggestions will be highly appreciated!