I have a centOS 5 box with 3ware 8 port raid cards.I run fsck.ext3 -y /dev/sdb1 and it shows as clean.But after writing to the FS for about 2 minutes, it becomes read-only.When I umont -l /data, and run the fsck I get that another program is using the system an I should wait.If I reboot the server , the array comes back as clean.

Any help with this please?

Thank you

You didn't state the exact model of the card but looking at 3ware fake RAID cards it appears that they provide drivers. Have you installed the drivers? I can infer from your device spec (/dev/sdb1) that this is not on a virtual disk but the drivers may be required all the same.

What process is writing to the mounted partition for 2 minutes? Is it a user mode process that you start manually under a normal user account or is it something that starts as root during system startup? Maybe that process is the problem.

When you say that the partition becomes read-only do you mean that the kernel has remounted the partition as read-only?

I would also want to know if you have configured any virtual disks on the RAID card setup that is available when the computer is first powered on before the computer runs an operating system.

Thanks for trying to assist.I believe the issue is that the array is degraded so one disk is rebuilding.I would normally be able to write to the array even when a disk is rebuilding but it seems that it wont work now, so I'll let it finish then run fsck on it then see what happens, because tune2fs, show its clean with errors.