Failed Upgrade 2.3 -> 3.0

Hi All,

I would appreciate some help with my failed upgrade of Proxmox 2.3 -> 3.0 on a HP Microserver N40L (installed using 2.3 ISO directly to first Hard Disc).

Upon reboot I am being dumped into Grub and can get the system partially booting by passing boot/init commands manually via the CLI.

However, boot is failing and I am being dumped to a recovery console

Found volume group 'pve' using metadata type lvm2
3 logical volume(s) in volume group 'pve' now active
Activating lvm and md swap...done
Checking file systems...fsck from util-linux 2.20.1
fsck.ext3: No such file or directory while trying to open /dev/pve/data
Possibly non-existant device?
...
...
fsck died with exit status 8
failed (code 8).

pvscan shows PV /dev/sda2 VG pve lvm2 232.38 GiB / 16.00 GiB free]
Total: 1

lv scan shows
ACTIVE /dev/pve/swap 4.0GiB inherit
ACTIVE /dev/pve/root 58.0GiB inherit
ACTIVE /dev/pve/data 154.39GiB inherit

How can I get fsck to agree that the disc is fine, so it can mount the volumes correctly and finally grub2 to let the system boot :)

Any help appreciated,

Gavin