Came in tonight and our Windows SBS 2003 server was beeping, and had errors about a missing RAID member. Attempted to access while in Windows, and the system locked up. Replaced the failed ("missing") drive with an identical spare, and the degraded (not failed, yet) logical RAID array would not accept the drive and rebuild. I formatted, initialized, assigned hot spare, to no avail. I am unable to boot into Windows at this time.