[CentOS] File system goes read-only once in a while

Fri Aug 1 06:21:26 UTC 2008
Mufit Eribol <hme at onart.com.tr>

William L. Maltby wrote:
> On Thu, 2008-07-31 at 10:08 +0300, Mufit Eribol wrote:
>> 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.
> If it happens again, you may be able to avoid the reboot with
>     mount -o remount,rw /mnt/raid
> As to your "how to check production ...", easy. The trade-off (down
> time, reboot, ...) makes it easy to decide to knock users down, umount
> the FS, run the check, remount, tell users they can go again.
William, thank you for the hint. Nevertheless,  the command doesn't 
mount rw. It says

mount: block device /dev/raid_vg0/raid_lv0 is write-protected, mounting 

I had to reboot again.