I have this HP ProLiant DL320 G5, acting as a domain controller, running Windows Server 2008 R2. The server has 2 SATA disks, which were configured in a RAID 1 volume using the system's onboard RAID controller (Intel-based).
Then, the server motherboard got fried, and was replaced by a clueless technician which didn't enable RAID in the server BIOS before booting it. Amazingly, the O.S. was able to actually boot, and then it changed its hardware configuration to reflect the different disk controller it was seeing now, detected two physical disks instead of a single RAID volume, and started working off the first disk. This has been going on for a while, and the second disk is currently out of date and completely unused.
Now I have cleared the second disk and I want to re-enable RAID in the server BIOS, but I fear this operation will wipe out all current disk contents (and the BIOS actually warns me of this when trying to do it).
Can I enable RAID mode for the onboard controller without losing current disk contents (of the first disk, the second one is now emtpy)?
Can I create a RAID-1 volume by cloning the first disk on the second one while not losing anything?
Will the O.S. be able to do its magical plug-and-play again and reconfigure itself to boot from the RAID configuration it was using before?
Of course I have a backup of the server, and I a pinch I can even reinstall it from scratch (it's only working as a domain controller), but I'd really like to avoid that.