Problems with older SCSI devices
If you have any older SCSI devices (e.g. SCSI-1 & early SCSI-2 mechanisms) connected to your SCSI Manager 4.3-compliant Macintosh (Power Macintoshes, Quadra 840AV, Quadra/Centris 660AV) or if you are running System Software 7.5 with the SCSI Manager 4.3 Extension installed, you may be experiencing system hangs/freezes or problems with initializing drives with the HDT Primerª PE application.
These older SCSI devices have problems with supporting the newer SCSI Manager 4.3 disconnect feature. Disabling the "allow disconnect" option in the driver configuration parameters window in the device's driver resolves these support problems. You may want to disable the "allow disconnect" option for all devices on the SCSI chain. This problem does not occur on non- SCSI Manager 4.3 systems or with non-SCSI Manager 4.3 drivers (such as in HDT PE 1.5 and earlier versions).
How to Access the Driver Configuration Parameters Window
Launch the HDT Primerª PE application. In the drive selection window, select the drive in question by clicking on it once. Hold down the Command, Shift, and Option keys while selecting "Update Driver" from the File Menu in HDT Primerª PE. In the Driver Configuration Parameters window, disable the "allow disconnect" option by unchecking the box next to it. There should be no "x" in the box now, indicating that you disabled the "allow disconnect" feature. Click on the Change button to save your change. Quit from the HDT Primerª PE application and restart your computer.
Machines Affected: All