Greetings!

Okay. If both work individually in the player, but not together... You are saying that it boots fine? Could you please post a boot log, just in case. It sounds like it is not mounting the music partitions on the new slave 20GB drive. The boot log might help.

One other thing to check - do you have the hijack option installed that ignores the second hard drive? It is there to make it boot faster. This has caught people in the past.

Edit: Tony, I was searching the FAQ for the hijack disable second drive check, when I saw that the largest disk drive is still 60GB. When you have time, you might want to update this to the 80GB, with the caveat that Laura found about running builder on an 80GB drive from a Mark I.