We have done fsck it fixed a few errors, mysql is starting but it doesn't seem to be responding, we are looking at making it on a new node now and bringing live from there.
We have found the core issue seems to be in some database tables and looks they may need to be restored, so we are going with a dual process on restoring to a new server and working on fixing on the current. This issue cropped up quite suddenly but upgrades were just done in Hsphere and we're verifying there was no issue there to cause this as well.