rebuild RAID 1 on IBM xseries 206 server

Posted on 2006-05-29
Last Modified: 2007-12-19

The situation:  I have a client with an IBM xSeries 206 server running Windows Server 2003 Standard and an Adaptec Embedded SATA HostRAID 7e Controller.  during a reboot the SATA RAID controller got disabled in the BIOS. i don't know why?

Windows see now two drives with three partitions each rather than one RAID volume with three partitions....  
DISK0: Part 1, 2, 3
DISK1: Part 4, 5, 6
Part 4 is "active"

can anyone suggest a method to recover from this situation?
i found the following solution in the forum:

1) Let it boot with the RAID disabled.
2) Back it up at the FILE level (using your backup program, i.e. Backup Exec/ArcServe)
3) Break and rebuild your RAID.
4) Re-install windows on the new RAID drive.
5) Restore into this new windows installation.

is it possible to set partition 1 as "active", make an full IMAGE (eg. ghost) from disk 0 (part 1,2,3) to an external USB disk
create a new RAID, restore from IMAGE...
could it be that the RAID definition is "stored" on the controller or on any disk, so that only the SATA raid controller must be enabled in the BIOS and then the raid could be rebuild without any problem?

thanks for a fast response!!!
Question by:Tpm73
    LVL 87

    Accepted Solution

    First, try to find out why the raid broke. Normally this has a reason, maybe a bad disk or sata cable. Test the disks individualy with the disk manufacturer's utility, preferably on an independant (not the raid) controller. Also look for smart errors that indicate a disk going bad. If one of the disk is going bad, replace it! And also replace the SATA cables, I've had problems with bad quality cables breaking the array.

    Then take just one of the disks and boot your system with it. If everything works OK, you can use that as the "master" (the disk that is used to copy to the other disk). Maybe you need to make it active, this can be normally be done through the array controller's utility, which should be startable via some key combination during startup. Take your other disk and clean it, then put it into the array and it should get rebuilt...
    LVL 44

    Expert Comment

    just re-enable the raid as you had it in the BIOS.  Then shut the system off without "initializing" or clearing the drives.  Then reboot.  If the RAID controller is designed properly, you should be able to boot immediately.

    If not, try -- RAID reconstructor utility.  It should be able to repair the raid, or at least get all the dat off it to another drive, then redo the RAID.  When you do, make it a straight RAID 1 mirror, just for safety !!!

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