Im total noob in this, but these are resources i found related to issue with fstab / damaged partition table

To get into diagnostics via IPMI/DRAC:
Reboot and press F12 to enter the Boot Menu
When the boot device list appears, highlight Diagnostics and press Enter


Try Pressing F8 repeatedly during boot or Go to BIOS and change default BOOTING DEVICE to HDD.
If error still occurs, Try inserting a windows recovery CD or Installation Disk and then using 'repair' Try 'Automatic Fixing' or 'Command-line ' type


"bootrec/fixmbr" and bootrec/fixboot.


Remout Read-Only filesystem from console? http://www.linuxquestions.org/questions/linux-general-1/cannot-edit-fstab-in-recovery-mode-filesystem-is-read-only-540195/


"it will be not bad idea to try the testdisk utility, it presents in almost every distro and searching phisical sectors for an extents looking like partition table." -> http://www.cgsecurity.org/wiki/TestDisk


fsck linux tool - recommended by several people when having filesystem issue:
1) http://www.leonli.co.uk/blog/516/etcmtab-is-not-writable-read-only-file-system-linux-virtual-machine-problem-solution
2) http://www.linuxquestions.org/questions/linux-general-1/server-suddenly-lost-mount-dev-sda-doesn%27t-contain-a-valid-partitio-4175523763/#post5262073