55
6. Unix Settings
This chapter describes how to configure various UNIX systems to recognize and obtain optimal per-
formance from the LTO-1 and LTO-2 tape drives.
The topics covered in this chapter are:
•
“A Word About SCSI Controllers” on page 55
•
“Configuring for the DEC/Compaq Unix Environment” on page 56
•
“Configuring for the Sun Environment (Solaris 2.4, 2.5, 2.6, 7, 8, and 9)” on page 57
•
“Configuring for the IBM AIX Environment (AIX Version 4.1.x and later)” on page 59
•
“Configuring for SCO Open Server 5.0.x” on page 60
•
“Configuring for Linux” on page 62
•
“Configuring for SGI Irix” on page 63
•
“Configuring for HP-UX 11.0” on page 64
A Word About SCSI Controllers
The LTO-1 drive transfers date at 32 Mbytes per second, with 2:1 compression of the data. The LTO-
2 drive transfers date at 68 Mbytes per second, with 2:1 compression of the data.
Both drives support the SCSI Ultra2 specification and can transfer data at burst rates of up to 80
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. The table
below lists the types of SCSI controllers that Certance recommends, in order of least preferred to
most preferred (top to bottom).
For definitions of the terms used above, please refer to SCSI Trade Organization Web site:
http://www.scsita.org/aboutscsi/index01.html
Table 17. SCSI Controllers
Controller Type
Maximum Transfer Rate
Fast Wide SCSI
20 Mbytes per second, compatible, not recommended
Wide Ultra SCSI
40 Mbytes per second, minimum for LTO-1
Wide Ultra2 SCSI (LVD)
80 Mbytes per second, minimum for LTO-1
Ultra 3 SCSI
160 Mbytes per second, minimum for LTO-2
Ultra 320 SCSI
320 Mbytes per second, preferred
