Hard Drives Missing in Leopard

Hi,
When I boot my Mac Pro with the newly installed Leopard, only my first hard drive appears on the system. The other hard drive, partitioned 3 times, is completely invisible. Invisible to the Finder, invisible to things like Photoshop and FCP (which use a partition as a primary scratch disk)
When I shut down the system and boot it up again, the hard drives are then visible. I have to turnon-login-logout-shutdown-turnon-login every morning to get it to work. Leaving the machine on Sleep over night makes things like Photoshop wig out (it can't find the HD again …)
All help welcome, cheers

sounds like the drive is "unmounting" for some odd reason.
instead of turning it off and on next time, try opening disk utility and mounting it (highlight it on left and then click "mount" button at top middle of DU window).
if that works, then most likely it a software issue. if not then maybe you have disk controller problem.
it may help to refresh your disk data file list (disk arbitration).
use this command at the terminal:
sudo disktool -r
if it is a hardware problem, then apple diagnostic utilities may help you find the trouble.
if there is a problem in the disk arbitration subsystem (corrupt file or something), an os reinstall may be required.
leopard has many third party software incompatibilities, be sure any software you are loading at startup are compatible and make sure your apps are leopard compatible as well and updated with the latest updates.

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