I have a Windows 2008R2 server with an Intel Rapid Storage RAID setup. It is a RAID 5 volume. Of the four 300 GB Western Digital Raptor drives configured, one suddenly disappeared from the array (the first drive). The server won't boot into Windows, and there is no visible or audible indication that the drive is missing (like an alert due to drive failure). It just does not appear in the configuration, and the server won't boot.
Under recovery in the configuration of the raid, there are two options, "Enable Only Recovery Disk", and "Enable Only Master Disk". The config says that either action "will result in a change from continuous update to on-request".
What do these two options entail, and if I do either will I change the configuration and lose the array?
Any other comments will be appreciated.