mounting error? [SOLVED]
 

ok so this is what i did... i decided to try archlinux in my pc a while ago so i installed it... after three months i started to miss slackware so i decided to reinstall it but i wanted to save my /home partition so when i installed slackware i left my /home partition from arch hoping that i could just mount it on slackware...
but now when i try to mount that /home partition this is what i get:

bash-3.1# mount /dev/sda4
mount: wrong fs type, bad option, bad superblock on /dev/sda4,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so

then:

bash-3.1# dmesg | tail
eth0: no IPv6 routers present
EXT3-fs: sda4: couldn't mount because of unsupported optional features (240).
EXT3-fs: sda4: couldn't mount because of unsupported optional features (240).
EXT3-fs: sda4: couldn't mount because of unsupported optional features (240).
mtrr: no MTRR for d0000000,8000000 found
EXT3-fs: sda4: couldn't mount because of unsupported optional features (240).
EXT3-fs: sda4: couldn't mount because of unsupported optional features (240).
EXT3-fs: sda4: couldn't mount because of unsupported optional features (240).
EXT3-fs: sda4: couldn't mount because of unsupported optional features (240).
EXT3-fs: sda4: couldn't mount because of unsupported optional features (240).

So i dont really know what is going on here but i hope somebody could help me because i really NEED to get the data from that partition.

oh and by the way i installed slackware on ext4 partitions and the /home partition from arch is ext3 so i dont know if that's maybe the problem o_O?

try using ext4, maybe Arch used ext4,
another posiblity is that Arch used some weird features.

Thanks for the reply, actually the solution is kind of weird 'cause all i did was change the FS type in fstab to ext4, and now is mounted :), although the partition is ext3,
for some reason telling slackware that the partition is ext4 it recognizes it. o_O!!

ext3 and ext4 are very similar file systems. well ext4 is formed from ext3 so ext3 back compatibility won't be broken. so Slackware said unsupported optional features were actually normal ext4 features.

I had the same issue.. I ran gparted and it listed the FS as ext4. I noticed the entry in /etc/fstab was ext3.. I changed to ext4 and all is well in the world again..