Quantum LTO-1 User's Guide

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Viper® 200 LTO Tape Drive

Unix Compatibility Guide

Introduction................................................................................................2

Configuring for the DEC/Compaq Unix Environment.............................3

Configuring for the Sun Environment

(Solaris 2.4, 2.5, 2.6, 7, and 8) ...................................................................5

Configuring for the IBM AIX Environment

(AIX Version 4.1.x and later)......................................................................7

Configuring for SCO Open Server 5.0.x...................................................9

Configuring for Linux ..............................................................................11

Configuring for SGI Irix ...........................................................................12

Configuring for HP-UX 11.0.....................................................................14

Removable Storage Syst em s, LLC. Other product names are trademarks or regis tered trademarks of their owners.

Seagate reserves the right t o change, without notice, product offeri ngs or specifications. No part of t hi s publication may be reproduced in any form without written permission from S eagate Removable Storage Solutions, LLC.

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

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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)

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Configuring for the DEC/Compaq Unix Envi ronment

Finding existing SCSI controllers and devices

SCSI ID #7 is almost always dedicated to the SCSI controller. Never configure your target device for ID 7 unless you are absolutely sure that the controller is not addressed for ID 7. Figure 1 shows the locations of the SCSI ID address jumpers for the Viper 200.

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Jumper Settings:

Drive-configuration jumper pins

Default settings:

Pins: Function:

1-2 SCSI ID bit 0 3-4 SCSI ID bit 1 5-6 SCSI ID bit 2 7-8 SCSI ID bit 3

9-10 Reserved

11-12 Termination Power

SCSI ID=0 SCSI ID=1 SCSI ID=2 SCSI ID=3 SCSI ID=4 SCSI ID=5 SCSI ID=6 SCSI ID=7

SCSI ID=8 SCSI ID=9 SCSI ID=10 SCSI ID=11 SCSI ID=12 SCSI ID=13 SCSI ID=14 SCSI ID=15 Term. power

Figure 1: SCSI jumper settings for the Viper 200

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Digital Unix Version 4.0 and later/Compaq Tru64 Unix 5.x

Use File Manager to open the file /etc/ddr.dbase and create an entry as follows:

SCSIDEVICE # Type = tape Name = "SEAGATE" "ULTRIUM" # PARAMETERS: TypeSubClass = tk TagQueueDepth = 0 MaxTransferSize = 0x0ffffff # (16MB - 1) ReadyTimeSeconds = 180 # seconds

CMD_PreventAllow = supported CMD_ExtReserveRelease = supported BlockSize = 0 PwrMgmt_capable = 0

DENSITY: # DensityNumber = 0,2,3,4,5,6,7 DensityCode = default CompressionCode = 0x0 Buffered = 0x1

DENSITY: # DensityNumber = 1 DensityCode = default CompressionCode = 0x1 Buffered = 0x1

Save the file. Run the following command:

ddr_config -c

ddr_config

will take the default input file, ddr.dbase, and build a new device database. This is effective immediately, and there is no need to rebuild the kernel.

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Note: ddr.dbase is a unix shell script and is not written in C. This means #

is used to signify a comment, not /* and */ or //, as used in C. Make sure any comments included in this file are preceded with the # character.

To enable the tape driver to turn on data compression when writing data to tape use the ‘c’ option.

For commands that use density and tape size settings the tape density is 124,000 bpi and the tape length is 1800 feet. For commands that use a blocking factor we recommend a blocking factor of 64 as a minimum, preferably 128.

Configuring for the Sun Environment (Solaris 2.4, 2.5, 2.6, 7, and 8)

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Use the following for attaching the Viper 200 to Sun Sparc and Intel systems.

Finding current SCSI controllers and targets

In order to properly attach SCSI devices to hosts it is necessary to ensure that each target device has a unique SCSI address. The commands ‘modinfo’ and ‘dmesg’ can be used to find the SCSI controllers in use and the SCSI target devices installed.

For example, the command “dmesg | egrep “target” | sort | uniq” can find all SCSI controllers and SCSI targets. The output may look similar to:

sd32 at ithps0: target 2 lun 0 sd34 at ithps0: target 4 lun 0 st21 at ithps1: target 0 lun 0 st22 at ithps1: target 1 lun0

In this case the Viper 200 could be set for SCSI ID address 2 thru 6 and attached to controller ithps1 (this particular controller also supports SCSI addresses 8 thru 15). See figure 1 to view how to set the SCSI ID address jumpers for the Viper 200.

Types of controllers

You may be able to view the man pages of three types of SCSI controllers for Sun Sparc systems, esp, glm and isp. We recommend that the Viper

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