input/output errors

[Benjamin Hornberger]

Hi all, 

we have a machine (RHEL AS 3) on which last night suddenly a lot of input /
output errors occured. Basically, two partitions are unusable. 

Both of these partitions are RAID 1 devices which share the same two IDE
hard disks (/dev/hda and /dev/hdc are two 250 GB drives, and /dev/md0 and
/dev/md1 are two RAID 1 devices which take 70 and 180 GB from each drive,
respectively). 

Any hints? I looked into fsck, but I am not sure what is the right thing to
do. 

Thanks for your help, 
Benjamin