I'm scratching my head on this one.

For this post, we have two Intel Xserves in question -- both a couple years old. A Dual 2.0GHz and a Dual 3.0GHz. The 2.0 GHz machine is running 10.5.8 just fine. We wanted to move those services to the 3.0 GHz machine.

We should be able to shut them all down, pull the drives (2 mirrored drives) from the 2.0 and put it in the 3.0, and boot up. Unfortunately, the 3.0 won't see the drives at all. Even if we hold down the option key at boot time, it won't see the drives. It just goes to the folder with the flashing question mark.

The 3.0 will boot off of another drive, either external or internal, 10.4, 10.5, whatever. It just doesn't like the drives from the other Intel Xserve.

To make sure we had all the right Software Updates, we installed 10.5.8 Mac OS X Server on that machine and ran all the software updates, including the LOM firmware update. It now reports that all software is up to date.

Any idea why it won't see the drives?