User's Guide
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T-010, Rev. B November 13, 2001
Introduction
This document describes how to configure various UNIX systems to
recognize and obtain optimal performace from the Seagate Viper 200 LTO
Ultrium tape drive. It summarizes drive configuration options, as well as
changes that may be required at the operating system level.
Note: Seagate makes no Warranty of any kind with regard to this
document. Seagate shall not be liable for any errors contained
herein, or indirect, special, incidental or consequential damages in
connection with the furnishing, performance, or use of this
document.
A word about SCSI controllers
The Viper 200 is capable of transferring date at 32 Mbytes per second with
2:1 compression of the data. The Viper 200 also supports the SCSI Ultra2
specification and can transfer data at burst rates of up to 80 Mbytes per
second . In order 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 Seagate recommends, in order of least preferred to most
preferred.
Controller type Maximum Transfer rate
Fast Wide SCSI 20 Mbytes per second
Wide Ultra SCSI 40 Mbytes per second
Wide Ultra2 SCSI 80 Mbytes per second
Ultra 3 SCSI 160 Mbytes per second
(For definitions of the terms used above, please refer to SCSI Trade
Organization web site: http://www.scsita.org/aboutscsi/index01.html)