With a storage loss on VCSA 6.5 I have came across this "fsck failed with error code 4" issue. Best thing I have found to do is continue in emergency mode by typing in your root password 2x. Get into shell and type: fsck /dev/mapper/log_vg-log This will prompt you with a lot of questions and just answer yes to them. Once done reboot and the VCSA should come back up.
