............................... STT20000N, STT20000N-C ............................... SCSI Minicartridge Drives ............................... (standard and NS-20 versions) ............................... ............................... Product Manual ............................... © 1998 Seagate Technology, Inc. All rights reserved No part of this publication may be reproduced in any form without written permission from Seagate Technology, Inc. Publication Number 10005135-001, March 1998 Seagate, Seagate Technology, the Seagate logo and Sidewinder are trademarks or registered trademarks of Seagate Technology, Inc. Other product names are trademarks or registered trademarks of their owners. Seagate reserves the right to change, without notice, product offerings or specifications. Seagate Technology provides this manual "as is," without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Seagate Technology assumes no responsibility for the accuracy, completeness, sufficiency, or usefulness of this manual, nor for any problem that might arise from the use of the information in this manual. FCC Notice This equipment generates and uses radio frequency energy and, if not installed and used properly--that is, in strict accordance with the manufacturer's instructions--may cause interference to radio communications or radio and television reception. It has been tested and found to comply with the limits for a Class B computing device in accordance with the specifications in Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio or television reception, which can be determined by turning the equipment on and off, you are encouraged to try to correct the interference by one or more of the following measures: · · · Reorient the receiving antenna. Relocate the computer with respect to the receiver. Move the computer into a different outlet so that the computer and receiver are on different branch circuits. If necessary, you should consult the dealer or an experienced radio/television technician for additional suggestions. You may find the following booklet prepared by the Federal Communications Commission helpful: How to Identify and Resolve Radio-TV Interference Problems This booklet (Stock No. 004-000-00345-4) is available from the U.S. Government Printing Office, Washington, DC 20402. Caution. Changes or modifications made to this equipment which have not been expressly approved by Seagate Technology may cause radio and television interference problems that could void the user's authority to operate the equipment. Further, this equipment complies with the limits for a Class B digital apparatus in accordance with Canadian Radio Interference Regulations. Cet appareil numérique de la classe B est conforme au Règlement sur brouillage radioélectrique, C. R. C., ch. 1374. Additional warnings: · To prevent fire or electrical shock hazard, do not expose the unit to rain or moisture. · To avoid electrical shock, do not open the cabinet. Refer servicing to qualified personnel. Important Information About This Manual All information contained in or disclosed by this document is considered proprietary by Seagate Technology. By accepting this material, the recipient agrees that this material and the information contained therein are held in confidence and in trust and will not be used, reproduced in whole or in part, nor its contents revealed to others, except to meet the purpose for which it was delivered. It is understood that no right is conveyed to reproduce or translate any item herein disclosed without express written permission from Seagate Technology. Seagate Technology provides this manual "as is," without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Seagate Technology reserves the right to change, without notification, the specifications contained in this manual. Seagate Technology assumes no responsibility for the accuracy, completeness, sufficiency, or usefulness of this manual, nor for any problem that might arise from the use of the information in this manual. Table of Contents Table of Contents Introduction 1 Drive overview ........................................................................................................ 1 Features ................................................................................................................. 4 Typical system configurations ................................................................................. 5 Minicartridge technology overview........................................................................... 5 Flash EEPROM ...................................................................................................... 6 Software ................................................................................................................. 6 References ............................................................................................................. 6 About this manual ................................................................................................... 7 Specifications 9 Overview ................................................................................................................ 9 Physical specifications ............................................................................................ 9 Power specifications ............................................................................................. 11 Drive performance specifications .......................................................................... 12 Environmental requirements ................................................................................. 13 Reliability .............................................................................................................. 14 Mean-Time-Between Failures ......................................................................... 14 Mean-Time-To-Repair .................................................................................... 14 Recommended tapes............................................................................................ 15 Regulatory compliance.......................................................................................... 15 Installation 17 Introduction........................................................................................................... 17 Handling guidelines............................................................................................... 17 Installation overview.............................................................................................. 17 Setting jumpers..................................................................................................... 18 SCSI device address jumpers................................................................... 19 Parity ....................................................................................................... 19 SCSI terminator enable ............................................................................ 19 Terminator power ..................................................................................... 20 Installing the drive................................................................................................. 21 Mounting dimensions ............................................................................................ 22 Cabling and connectors ........................................................................................ 23 Electrical characteristics ........................................................................... 24 Single-ended SCSI connector......................................................................... 25 STT20000N Product Manual Page v Table of Contents Drive operation and maintenance 27 Introduction........................................................................................................... 27 Front panel LED operation .................................................................................... 27 Using Travan cartridges ........................................................................................ 28 Loading and unloading tape cartridges............................................................ 28 Setting the write­protect switch ...................................................................... 29 Loading revised firmware from a Seagate firmware cartridge ................................ 29 Drive maintenance ................................................................................................ 30 Caring for tape cartridges ............................................................................... 30 Cleaning the drive read/write head.................................................................. 31 Troubleshooting .................................................................................................... 32 SCSI Interface 33 Introduction........................................................................................................... 33 SCSI-1 interface ................................................................................................... 33 SCSI-1 status codes....................................................................................... 33 SCSI-1 message codes .................................................................................. 34 SCSI-1 commands ......................................................................................... 35 ANSI X3.131 CONFORMANCE STATEMENT (SCSI-1) ....................................... 36 General features............................................................................................. 36 Commands..................................................................................................... 36 Messages....................................................................................................... 37 Vendor-unique commands .............................................................................. 37 SCSI-2 interface ................................................................................................... 37 SCSI-2 status codes....................................................................................... 37 SCSI-2 message codes .................................................................................. 38 SCSI-2 commands ......................................................................................... 38 ANSI X3.T92 conformance statement (SCSI-2) .................................................... 40 SCSI-2 general features ................................................................................. 40 SCSI-2 commands ......................................................................................... 40 SCSI-2 messages........................................................................................... 41 SCSI-2 vendor-unique commands .................................................................. 41 Command set changes to Incorporate RWW and HDC ......................................... 42 Read-While-Write ........................................................................................... 42 Log Sense Write Error Counts page code (02h)........................................ 42 Hardware data compression ........................................................................... 43 Mode Select / Mode Sense Data Compression page code (0Fh) .............. 43 Parameters that control data compression................................................ 44 Page vi STT20000A Product Manual Table of Contents Tape format 45 Introduction........................................................................................................... 45 Tape partitioning ................................................................................................... 45 Track positions ..................................................................................................... 45 Track numbering................................................................................................... 46 Track format ......................................................................................................... 46 Frames........................................................................................................... 46 Blocks ............................................................................................................ 48 Tape reference servo pattern ........................................... ...