I have a weird problem with an external disk connected to my 27" iMac running OS X 10.6.5.
It is a 1TB LaCie d2 Quadra and it is connected through Firewire.
I use this disk primarily for Time Machine backups, which works well and fast.
The problem is that when this disk wakes up, it locks up the complete iMac. While I hear the disk spin up my iMac is unresponsive. Then when the disk is ready, the iMac comes back to life.
What is going on here?