Quantum LTO-2 manual Word About Scsi Controllers, Configuring for the DEC/Compaq Unix Environment

Chapter 6 UNIX Settings

A Word About SCSI Controllers

A Word About SCSI Controllers

The LTO-2 Half-Height Tape Drive transfers data at 40Mbytes per second, with 2:1 compression of the data. The drive supports the SCSI Ultra3 specification and can transfer data at burst rates of up to 160 Mbytes per second. To achieve maximum drive performance, it is important to choose high-performance disk drives for your system, as well as high performance SCSI controllers. Table 11 lists the types of SCSI controllers that Quantum recommends, in order of least preferred to most preferred (top to bottom).

Table 11 SCSI	Controller Type	Maximum Transfer Rate
Controllers
	Wide Ultra2 SCSI	80 Mbytes per second, compatible
	Ultra 3 SCSI	160 Mbytes per second, minimum preferred
	Ultra 320 SCSI	320 Mbytes per second

For definitions of the terms used above, please refer to SCSI Trade

Association web site: www.scsita.org/aboutscsi/index01.html

Configuring for the DEC/Compaq UNIX Environment

Finding Existing	SCSI ID #7 is almost always dedicated to the SCSI controller. Never
SCSI Controllers	configure your target device for ID 7 unless you are absolutely sure that
and Devices	the controller is not addressed for ID 7.

50 LTO-2 Half-Height Tape Drive User’s Guide