Started a session on a firewire drive and it was working fine. Decided to copy (drag and drop) the session onto the new 73GB Cheetah and play it back from the new scsi drive. When the cursor reaches a place in the timeline where the regions "get busy", the Mac gives us a 9073 error. Different playback engine settings, 32 voice or 48 voice do not have an effect. Neither does using 2 DSP's The DAE Buffer is at 2. The Toast CD reader extention is disabled. File sharing and calculate folder size are both off. The Mac is G4 733 single processor using the 9.2 OS. . Hardware is an HD 192 I/O and a Sync IO. PT is vers 5.3.1 The SCSI card is a new ATTO and the Cheetah was formatted with Atto's Express pro tools 2.7. from the Pro tols 5.3.1 CD. No partitions. Advice? Thanks

How many tracks are you running from the 73 GB drive?

Paul, Do you have the SCSI bus terminated with an active terminator? Drive performance will suffer if the bus isn't terminated. Also, do you have any other devices in the SCSI chain before the drive, i.e. CD-R or tape back-up? If you do, move them to the other bus on the ATTO card. If the drive is internal remove any other external SCSI devices that may be sharing the same bus. You can check to see what bus the devices are on, in ATTOs Express Pro-Tools. I believe the internal bus is shared with the first external bus. Mike

Are you using your 'new' drive along with the other one, in ONE session? Recently, I installed an internal IDE disk . Since then, the problems started. PCI-to-busy-problems all the time. The IDE built-in disk was not too slow, I even could run 3:1 video on it without a problem. Later AVID-support found out that you shouldn't use audio from BOTH the 'fast scsi-drives' and the IDE-drives IN THE SAME session. The result is that the PCI-bus is overloaded. Solution : EITHER the one drive OR the other, OR multiple drives with the SAME specs.... Ruud de Boer, Amsterdam

Paul, look carefully at the settings of your ATTO card in Express Pro Tools. Are they correct. Especially look at the PCI Burst rate and Fallback Sync rate settings of the card and the sync rate settings of the drive. What ATTO card is it? UL2D? UL3D? 4D? Check these settings: New Recommended ATTO settings for approved SCSI Host Bus Adapters with Pro Tools

Once again thanks for the help! The drive and the paper docs do not list whether this drive is an XP or not. The drive itself does have the following info printed on it: ST173404LCV Part #9N009-001# The ATTO is a UCL3D. Current settings on bus 1 are: PCI burst rate: 512 bytes Fallback Sync rate: 40 (20) Please note that the pop up window only goes this high - 40 (20). All other settings are lower. For example we tried 16 (8) with a burst rate of 128 bytes and the problem still occurs. I am not certain why the Digi site lists 160 (80) when these settings do not appear to be available. Advice would be much appreciated here as well. Thanks everyone!

Paul. I have had this exact same problem happen to me in the past where a session plays fine up to a specific point and then a 9073 error occurs. This happens repeatedly at the exact same point in the session everytime. Does the session play fine after this point? When this happened to me, I found the problem lies in a corrupt file(s). For me, this file is usually a fade, but I was involved in a situation where the corrupt file was a 30 sec audio file. I suggest recreating the fades on all tracks coming up to the point in the session where the 9073 error occurs. If this does not help, try soloing each track individually and play through the point of error. If there's a bad file, you can find it this way.

Digging deeper, I found (and verified) the 160 (80) setting by double clicking on the drive itself under the Bus 1 submenu. So that is correct. (No ATTO options are selected, such as "removable" by the way.) Now the drive is locking up with a new session! One that originates on the drive.