I can boot to the OS but when I replace the failed drive, the software does not recognize the drive, followed by the server not being able to boot. It is not hot-swappable due to the server not having a raid controller. It was setup using 2 250GB sata drives and configured for RAID1. The new drive is working fine because I placed it into another server to verify. Strange..
There's some more notes at http://communities.intel.com/thread/21329?tstart=0
If one machine sees the drive fine, can you wipe the drive on that machine, then move it over?
Are you sure the two drives are running the same firmware revision? What's the make and model?