Journaling can be toggled on/off with Apple’s “Disk Utilty” (/Applications/Utilities/Disk Utility). To toggle journaling on the startup disk, you need to boot off an external volume (CD, FireWire etc.).
In my understanding, journaling for media drives should be disabled.
I read an article somewhere about this issue but unfortunately can’t remember where (could have been XLR8YourMac, BareFeats or HD for Indies).
I also read somewhere (same article?) about problems with the automatic indexing service for Spotlight in 10.4 Tiger.
Best regards, Oliver