Partitions are mounted wrong

[Mitar]

my /etc/fstab :

/dev/md0    /boot   ext2    noauto,noatime  1 2
/dev/md1   none     swap    sw              0 0
/dev/md2    /         ext4     noatime         0 1
shm  /dev/shm    tmpfs       nodev,nosuid,noexec    0 0

Most of time it was ok , but from last time updates it changed and now looks like that :

Filesystem           1K-blocks      Used Available Use% Mounted on
rootfs               238158544 117808536 108252264  53% /
/dev/root            238158544 117808536 108252264  53% /
rc-svcdir                 1024       116       908  12% /lib64/rc/init.d
udev                     10240       200     10040   2% /dev
shm                    2024624         0   2024624   0% /dev/shm
shm                    2024624         0   2024624   0% /dev/shm

also it says that /dev/root is mounted as ext3 and my partition is ext4

boot log says :

[    1.237277]  md2: unknown partition table
[    1.260137] EXT2-fs (md2): error: couldn't mount because of unsupported optional features (240)
[    1.313171] EXT4-fs (md2): mounted filesystem with ordered data mode. Opts: (null)
[    1.313361] VFS: Mounted root (ext3 filesystem) readonly on device 9:2.

How can I fix this , so it will all mount properly as earlier ?
Also I have kernel 2.6.38-gentoo-r6 x86_64 version.

[bleedingsamurai]

have you tried running fsck on it? sometimes if a file system gets damaged from improper shutdown it will be mounted as readonly.

you should boot off a livecd when you run fsck. and the command should look like this:

fsck -y /dev/ROOT

replace ROOT with the actual device file your root partition gets mounted as. the -y handle pretty much says yes to all repairs, which can sometimes be considered dangerous. but if you leave the -y off you will be forced to manually approve each file system repair which can take a long time.

[Mitar]

problem solved by adding

rootfs=ext4

to grub kernel command line