From GEAR Software Knowledgebase
In the CD Recorder Setting dialog for SCSI Settings, you can specify the Interface driver and buffering settings. When you change the SCSI settings GEAR may prompt you to reset the SCSI bus. Click OK to reset the SCSI bus. The maximum transfer block or buffer size for SCSI is a little less than 64 KB.
GEAR user one of the available drivers. You can chose from Standard, Tracer and Caldera SCSI drivers. Depending on the platform you may only be able to use a particular driver and the other choices will not be displayed.
The Host adapter and TargetID are set by the system.
The buffering concept is explained in the next section. The default settings have been tested with a wide variety of drives and computers. You may however experiment with different settings if you encounter problems writing discs.