Disk unreadable after RAID Controller BIOS and NVRAM downgrade
Posted on 2004-11-13
Our hardware vendor downgraded the BIOS of our Adaptec 3200 S SCSI controllers before adding a second SCSI controller in each node of our W2K cluster in order to achieve a configuration supported by the hardware vendor.
Now Windows wont read the disks and disk manager shows the status "unreadable".
The RAID Drives are recognized as optimal by the controller BIOS and are recognized by Windows as RAID 5 Drives in device manager.
In the first configuration after the upgrade, the SCSI controller id of the RAID controller in question was raised from 0 to 1. Changing the sequence of controller ids had no favorable effect on the disk status.
Does anybody have an idea about how we could regain the drives ?
We have a backup, but we could lose a certain amount of data.
The drives and partitions are all visible in Symantec Volume Manager and pass integrity checks.