Hi, My Centos 5.2 server (5.1 suffered the same problem as well) has a logical volume on a RAID 10 array (4 SATA harddisks on a Highpoint RR2310 controller). /etc/fstab has an entry for this array as below /dev/raid_vg0/raid_lv0 /mnt/raid ext3 defaults 0 0 Normally it works OK. But, file system of "this volume" once in a while goes "read only" mode. The RAID software reports no problem with the hard disks. After reboot, the system comes back in normal rw mode. What could be the reason?. I would appreciate any help/hint. Thank you, Mufit