Where you went wrong was step 3 of your Rollback.  By hitting continue and ignoring the "BIOS message", you told the controller to NOT use (ignore) the configuration on the disk and use the controller's configuration, in which there is no disk 0 and now disks 1,2 are missing.  You want to always import the configuration in this kind of scenario (although it is VERY important to understand the difference between when to clear and when to import before ever choosing either). The foreign flag on the disk MUST be cleared before you can do anything with it.  In OMSA, go to Storage, PERC, Information/Configuration (link at top of page), then Foreign/Clear from the dropdown menu of Available Tasks for the controller.  Once cleared, the disk will show as Ready, then it can be assigned as a hot-spare.
Hi, I had a poweredge r610 server with 3 disks in a raid 1 config (1 hot spare). I needed to do some critical server maintenance. I decided to use a raid disk as a backup and performed the following: 1. power off server2. pull out disk 0 (not the hot spare)3. power on server and hit continue a BIOS complained about disk configuration change4. Waited 20 mins for RAID to rebuild5. Did maintenance work - unfortunately didn't go to plan - start roll back6. Shut down server Roll back:1. Pull out remaining disks (1 & 2)2. Popped back in disk 03. Ignore BIOS message about disk configuration - hit continue --> generates an error no virtual disk/no boot device found4. Reboot, this time choosing option to import foreign disk configuration --> generates an error no virtual disk/boot device found5. Powered off server, removed disk 0, put disk 1 & 2 back in and luckily restored from Windows backup Should my roll back procedure of worked, by simply pulling at disk 0 to begin with and then later using disk 0 as a single boot device? Also, currently all 3 disks are in the server, disks 1 & 2 are in a RAID 1 configuration. Disk 0 is in a foreign state, I've had a look within the Server Administrator web app to see if I can assign this disk as a hot spare, but I can't. Am I right in thinking I need to reboot the server and use the RAID utility to import the disk/assign it as a hot spare? Thanks
Poweredge R610 Assigning Hot Spare