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Viper 200 Installation Manual
Unix configuration settings
This section describes how to configure various UNIX
systems to recognize and obtain optimal performance 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. In some cases, this
involves editing system files. Make a backup copy of any
system files before doing this.
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
Fast Wide SCSI
Wide Ultra SCSI
Wide Ultra2 SCSI
Ultra 3 SCSI
(For definitions of the terms used above, please refer to SCSI
Trade Organization web site:
http://www.scsita.org/aboutscsi/index01.html)
Maximum Transfer rate
20 Mbytes per second
40 Mbytes per second
80 Mbytes per second
160 Mbytes per second
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