[CentOS] Dell 2950 with CentOS 5.3

Hi all, Any one experience issue with Dell 2950 and CentOS 5.3, I face some issue like this, server install alright. Keep it in production for a while, Done an update one the server. Reboot , It said no boot devices found. Check on the perc6/i controller the both harddisk show online and optimal. Using live cd to check, the both harddisk still have the data.

My issue was solve by removing the hard disk, clear the raid configuration. Put in the hard disk and reimport the configuration from the harddisk. The server able to boot up properly.

any one know the cause of it, is it the Dell Hardware issue or it is an OS related issue.

Regards KS