2 Replies Latest reply on Jun 11, 2015 9:16 AM by joe_intel

    X10SAE Raid 1 Recovery - Missing Operating System - after booting in AHCI switch back to Raid - mainboard change

    Frogger80

      Hello,

      I had a problem with our mainboard due to a faulty bios update.

      The board is a supermicro X10SAE. There are 2 drives attached as Raid 1. Operating System is Microsoft Server 2012 R2.

       

      I bought a "new spare mainboard" same type but it came with a newer Bios. Computer booted. Unfortunately I missed to set "Default Bios setting for Sata Mode" = "AHCI" to "Raid" before I booted.

      As said Computer booted and found operating system, which started and Win Server made automatically some configuration settings probably caused by AHCI mode. However System started, but it was of course in AHCI mode and the second harddrive was accessible as single drive in Win Server.

       

      I powered down the Win Server and changed the SATA AHCI setting in Bios to RAID mode. Computer started and found my original RAID Array with Two "member disks". Status Normal. So far so good.

      Then a message like "Missing Operating System" appeared. So I could not start resp. boot in RAID mode. If I switch back to AHCI it works, but I would have both drives working in RAID 1 as before.

       

      I have read some forum articles and if I understand it correct: If you boot a Intel RAID system in AHCI mode instead of RAID is getting defect? Is this correct?

      What happend? Was the MBR of the RAID destroyed by booting in AHCI mode or what is the reason?

      And what is more important to me  "How can I get back the system starting from RAID"?

       

      Your help is appreciated.

      Best regards!

        • 1. Re: X10SAE Raid 1 Recovery - Missing Operating System - after booting in AHCI switch back to Raid - mainboard change
          Frogger80

          Hello,

          found following for a first step:

           

          1.Loading Windows Recovery / Cmd Prompt via an USB Stick (Windows 7 USB / DVD Download Tool)

          2.Entering Command Prompt

          a.) Command: Diskpart

          b.) Command: List Disk

          b.) Command: Select Volume 0

          c.) Command: Active = Set Volume Active (bootable)

           

          Then following Commands:

          bootrec /scanos
          bootrec /rebuildbcd
          bootrec /fixmbr
          bootrec /fixboot

           

          Computer booted and seemed to find MBR and loaded  "Preparing Automatic Repair". Then I have the choice of "Continue Loading Win Server 2012 R2" or "Troubleshoot" or "Turn off".

          1.) Continue Loading --> It loads something then blank screen and restart. And againg loading "Preparing Automatic Repair"

          2.) Troubleshoot

          a) Command Prompt --> Not Possible because no Adminstrator account was found??

          b) Startup settings --> This brings up another boot screen, but any choice onds up with loading "Preparing Automatic Repair" or Restart

          • 2. Re: X10SAE Raid 1 Recovery - Missing Operating System - after booting in AHCI switch back to Raid - mainboard change
            joe_intel

            Did you contact Super Micro* about this? I suggest doing so because the RAID software usually is specific or customized for this board.

            It might be possible to reset the member disks to non-RAID and see if it can boot with the SATA controller in RAID mode again; then, rebuild the RAID from one of the existing drives while maintaining the data. I know this is possible in Desktop Chipsets but I am not aware of your Server RAID solution, so you will need to ask Super Micro if such thing is possible with your system.