[markw10]

I have a Mac Pro and hooked 2 Western Digital My Book 750GB drives via Firewire onto it to use as my time machine backup for the two MBP's in the house.
The problem I run into may be more network related than Time Machine related. I have the file sharing turned on in Mac OS 10.5.2. I am able to select Mac Pro in Finder on each MBP and then under that select my Time Machine drive. Then within Time Machine I can select the My Book as my Time Machine drive. At this point I have no problem using Time Machine.
Where the problem occurs is if I use Finder to browse other drives such as an Internal Drive I have in my MBP or my Mac Mini's drive it no longer can find the Time Machine drive. It just is like it loses sight of it somehow. All I need to do is once again go to Finder/Mac Pro and then select the specific Time Machine drive and then Time Machine is fine again.
How can I get around this? It seems i have to make some type of permanent logon or so to this drive.

[ibook_steve]

OK, very confused. You're saying that you have drives attached to a Mac Pro that you want to use to backup all machines in your house, correct? From remote machines, you can see these drives, and backups (Time Machine Airdisk) work, correct? However, when you browse the drives in the Finder, they disappear? Do they unmount (icon disappears from desktop)? What exactly happens when you "lose" them?

Steve