root@ubuntu:/boot# sudo fsck /dev/hda1
fsck 1.38 (30-Jun-2005)
e2fsck 1.38 (30-Jun-2005)
Group descriptors look bad... trying backup blocks...
/dev/hda1 was not cleanly unmounted, check forced.
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Filesystem contains large files, but lacks LARGE_FILE flag in superblock.
Fix<y>?