Chapter 6 - Unix Settings; A Word About Scsi Controllers; Table 13. Scsi Controllers - Certance LTO-2 Online User's Manual

6 Unix Settings
This chapter describes how to configure various UNIX systems to recognize and obtain optimal per-
formance from the LTO-2 half-height tape drive.
The topics covered in this chapter are:
"A Word About SCSI Controllers" on page 44
•
"Configuring for the DEC/Compaq Unix Environment" on page 45
•
"Configuring for the Sun Environment (Solaris 2.4, 2.5, 2.6, 7, 8, and 9)" on page 46
•
"Configuring for the IBM AIX Environment (AIX Version 4.1.x and later)" on page 47
•
"Configuring for SCO Open Server 5.0.x" on page 49
•
"Configuring for Linux" on page 51
•
"Configuring for SGI Irix" on page 52
•
"Configuring for HP-UX 11.0" on page 53
•

A Word About SCSI Controllers

The LTO-2 half-height drive transfers data at 20 Mbytes per second, with 2:1 compression of the
data. The drive supports the SCSI Ultra2 specification and can transfer data at burst rates of up to
32 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 13
below lists the types of SCSI controllers that Certance recommends, in order of least preferred to
most preferred (top to bottom).

Table 13. SCSI Controllers

Controller Type
Fast Wide SCSI
Ultra 3 SCSI
Ultra 320 SCSI
For definitions of the terms used above, please refer to SCSI Trade Association web site:
http://www.scsita.org/aboutscsi/index01.html
Maximum Transfer Rate
20 Mbytes per second, compatible, not recommended
160 Mbytes per second, minimum for LTO-2
320 Mbytes per second, preferred
44