Specifications

Qualified SCSI HBA Cards
For maximum track count, use of a qualified SCSI HBA (Host Bus Adapter)
card is required. Optional SCSI HBA cards bundled (by Apple) with some
G3 and G4 computers are not compatible due to lack of support for
external drives.
Depending on your computer certain ATTO ExpressPCI and Adaptec Power
Domain cards are qualified for use with Pro Tools, refer to your computer's
"SCSI HBA Card" section for details at the following links:
● G4 with AGP Graphics
● G4 with PCI Graphics
● Blue & White G3
● Beige G3
● 9500/9600
SCSI HBA cards are not required for Pro Tools III Systems.
Note: Adaptec 2940UW and 3940UW cards with G4s are unsuitable for full
Pro Tools performance. Due to PCI bus related issues the Adaptec 2940UW
and 3940UW SCSI HBA cards are unable to provide full Pro Tools
performance. Additionally, Adaptec has discontinued these cards, and as a
result there will be no future engineering support from Adaptec on these
cards.
Digidesign Compatibility Documents Index