Using external scsi for internal drive.

Hi people. I have a beige g3 desktop and recently bought a sound card (pro tools project pci) that has a scsi port for external drives. The card wont work without a drive atached, and I was wondering if I could use a 50 pin centronics to 50 pin internal cable adapter to use an internal scsi inside the g3.
External scsi cases are cheap but I am trying to make some sort of portable set up and would love to avoid them.
I saw adapters on the web but could not find any here (argentina) and it is a headache to get one sent here.
Anyone have any experience with this?
Thanks in advance
Pepo

I've never used the Digidesign Pro Tools Project card, so is the external hard drive strictly needed to terminate the card's SCSI bus or does the card's configuration software require it? If you just need termination, is the card's external port the HD-50 SCSI-2 type? If so, would this active terminator solve the problem? If the interface isn't the correct one to match the one on the PCI card, could you connect a Centronics-50 active terminator to the end of the cable?
If you need to have a hard drive connected with the setup, were you planning on running the external cable through an unused PCI slot opening in the back? For a clean-looking installation, you could install an adapter like this one, in place of the PCI slot's blank cover. Unfortunately, it prevents the use of the PCI slot for other cards, and this adapter has an external DB-25 port, requiring the adapter to Centronics-50. A standard 50-conductor SCSI ribbon cable would connect between the hard drive and the interior port on the adapter card. I don't know if you've noticed, but just behind the left-side drive bays in the G3 desktop, you'll see a removable piece of metal that closes off the inside corner of the drive bay chassis. You can remove that piece of metal, and provide a path for the drive's data cable to reach the PCI slot area of the computer. It's easier than routing the cable back through the slot behind the CD-ROM drive, which is usually too crowded with cabling anyway.

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