Macintosh AV Series: Update Older Hard Disks

Yes, use HD SC Setup 7.2.2 to update any older hard disks you plan to use with the Centris 660AV or Quadra 840. Use the following procedure to update your hard disks:

1. Launch Disk First Aid 7.1.1 or higher. (Disk First Aid 7.2 is shipped on the Software Utility Update 1.0 and higher disk.)

2. Select the disk you wish to update.

3. Click the Start button (for Disk First Aid 7.2, click Verify.) Disk First Aid will inform you if any repairs are needed.

4. If repairs are needed, click the Repair button.

5. Repeat steps 2 through 4 for any additional hard disks you wish to update.

6. Quit Disk First Aid.

7. Launch HD SC Setup 7.2.2 or higher.*

8. Click the drive button to select the hard disk you wish to update.

9. Click the Update button. This installs the new version of the SCSI driver.

10. Repeat Steps 2 and 3 for any additional hard disks you wish to update.

11. Click the Quit button to return to the Finder.

*Note:

- Make sure that Disk First Aid and HD SC Setup is not running from any hard disk you wish to update.

- Make sure that none of the hard disk(s) you wish to update is the startup disk.

Why Update Older Hard Disks?

The Centris 660AV and Quadra 840AV use a new SCSI Manager, 4.3, a new system level manager that extends the capabilities of Macintosh systems both in terms of functionality and performance.

This new SCSI Manager is fully asynchronous, allowing each of several SCSI devices to have multiple requests outstanding. By queuing requests in this manner, overall throughput is improved. Other features such as direct memory access (DMA) support further enhance overall performance. Functionality has been improved through support for multiple buses and hardware configurations, and support for SCSI-2 messages and protocol actions.

Hard disks not updated using HD SC Setup 7.2.2 or higher will run approximately 15-20 percent slower than updated hard disks.