No idea what I've done, but I just started getting this error everytime I boot.

Running Ubuntu 12.04.

I was able to see more of the boot log by removing splash and quiet from grub. I believe this is the culprit:

init: mountall main process (306) terminated with status 1

I've done as NikTh suggested, however my fstab is present and has the correct UUID:

ubuntu@ubuntu:/mnt/etc$ cat fstab

# /etc/fstab: static file system information.

#

# Use 'blkid' to print the universally unique identifier for a

# device; this may be used with UUID= as a more robust way to name devices

# that works even if disks are added and removed. See fstab(5).

#

# <file system> <mount point>   <type>  <options>       <dump>  <pass>

proc            /proc           proc    nodev,noexec,nosuid 0       0

# / was on /dev/sda5 during installation

UUID=8f1d7319-7383-4151-bb2b-db84fd079d50 /               ext4    errors=remount-ro 0       1

# swap was on /dev/sda6 during installation

UUID=5dc94483-0bad-4afe-9b46-96ba0fb83b3c none            swap    sw              0       0

blkid:

ubuntu@ubuntu:/mnt/etc$ sudo blkid

/dev/loop0: TYPE="squashfs" 

/dev/sda1: LABEL="System Reserved" UUID="005C1A835C1A741E" TYPE="ntfs" 

/dev/sda2: UUID="4CFA26FDFA26E2C6" TYPE="ntfs" 

/dev/sda5: UUID="8f1d7319-7383-4151-bb2b-db84fd079d50" TYPE="ext4" 

/dev/sda6: UUID="5dc94483-0bad-4afe-9b46-96ba0fb83b3c" TYPE="swap" 

/dev/sdb1: UUID="BE98191D9818D5AD" TYPE="ntfs" 

/dev/sdc1: LABEL="MULTIBOOT" UUID="3226-D49A" TYPE="vfat" 

Also, fsck does not seem to find any problems:

ubuntu@ubuntu:/$ sudo fsck /dev/sda5

fsck from util-linux 2.20.1

e2fsck 1.42 (29-Nov-2011)

/dev/sda5: clean, 211250/8994816 files, 2044589/35973120 blocks

How can I fix this? If additional information is required, I can provide.