Detailed instructions for use are in the User's Guide.
TANDBERG SLR
Tandberg SLR7, SLR50, SLR60, SLR75, SLR100, SLR140
SCSI INTERFACE FUNCTIONAL SPECIFICATION
TANDBERG DATA ASA P.O. Box 134 Kjelsås N-0411 OSLO, NORWAY Phone + 47 22 18 90 90 Telefax + 47 22 18 95 50 © Tandberg Data ASA
Part No. October
43 07 43 Â 13 2003
Related publications available from Tandberg Data ASA: Part No. 43 04 44 - 11 Title Tandberg SLR7, SLR50, SLR60, SLR75, SLR100, SLR140 Reference Manual
This publication may describe designs for which patents are granted or pending. By publishing this information, Tandberg Data ASA conveys no license under any patent or any other rights. Every effort has been made to avoid errors in text and diagrams. However, Tandberg Data ASA assumes no responsibility for any errors, which may appear in this publication. It is the policy of Tandberg Data ASA to improve products as new techniques and components become available. Tandberg Data ASA therefore reserves the right to change specifications at any time. We would appreciate any comments on this publication.
Table Of Contents
1.
1.1. 1.2. 1.3. 1.4.
Introduction .....................................................................1
General .............................................................................................. 1 Overview............................................................................................ 2 Glossary............................................................................................. 3 Additional Reference Documentation................................................ 5
2.
2.1. 2.2. 2.3. 2.3.1. 2.3.2. 2.3.3. 2.3.4. 2.4. 2.5. 2.6. 2.6.1. 2.6.2. 2.6.3. 2.6.4. 2.7. 2.7.1. 2.7.2. 2.7.3. 2.7.4. 2.7.5. 2.7.6. 2.7.7. 2.7.8. 2.7.9. 2.8. 2.8.1. 2.8.2. 2.9. 2.9.1. 2.9.2. 2.9.3. 2.9.4. 2.10. 2.11.
About Tape Streamers ....................................................1
Physical Elements ............................................................................. 1 Data Storage Characteristics............................................................. 1 Partitions Within a Volume ................................................................ 3 Partitioning a Volume................................................................. 4 Selecting a Partition ................................................................... 6 Using Initiator Defined Partitions ............................................... 8 Quick File Access .................................................................... 11 Logical Elements Within a Partition ................................................. 14 Overwrite ......................................................................................... 15 Using Fixed and Variable Length Blocks......................................... 17 Variable and Fixed Length Blocks ........................................... 17 Writing ...................................................................................... 17 Reading.................................................................................... 18 Illegal Length Conditions when Reading ................................. 18 Data Buffering.................................................................................. 19 Introduction .............................................................................. 19 Data Formatting ....................................................................... 21 Buffered Mode ......................................................................... 23 Read-Ahead............................................................................. 25 Underrun/Overrun .................................................................... 25 Buffer Thresholds..................................................................... 26 Disconnect/Re-connect............................................................ 27 Data Re-transfer ...................................................................... 28 Buffer Parity Errors .................................................................. 28 Data Compression........................................................................... 29 Background.............................................................................. 29 Controlling Data Compression................................................. 30 Optimizing Streaming Operation ..................................................... 33 Forced Streaming .................................................................... 33 AVC (Automatic Velocity Control)............................................ 33 Using both Forced Streaming and AVC................................... 34 Recommended Settings .......................................................... 35 Recorded Objects............................................................................ 35 TapeAlert ......................................................................................... 36
3.
3.1. 3.1.1. 3.1.2. 3.2. 3.2.1. 3.3. 3.4. 3.5. 3.5.1. 3.5.2.
Logical Characteristics ...................................................1
SCSI-bus Phases .............................................................................. 1 Bus Management Phases.......................................................... 1 Information Transfer Phases ..................................................... 2 SCSI-bus Phase Sequences ............................................................. 3 Legal Phase Sequences ............................................................ 4 SCSI Pointers .................................................................................... 9 Unit Attention ................................................................................... 11 SCSI-bus Conditions ....................................................................... 12 Attention (ATN) ........................................................................ 12 Reset........................................................................................ 13
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Table of Contents
4.
4.1. 4.2. 4.3. 4.4. 4.5. 4.5.1. 4.6. 4.6.1. 4.6.2. 4.6.3. 4.6.4. 4.6.5. 4.6.6.
Commands.......................................................................1
The Command Descriptor Block........................................................ 1 Command Control Byte ..................................................................... 2 Reserved Fields................................................................................. 3 Command Set Summary ................................................................... 4 Command Sequencing ...................................................................... 6 Normal Modes............................................................................ 6 Multiple Connections ......................................................................... 9 Background................................................................................ 9 Commands Received Serially, LUN Is 0.................................. 10 Commands Received Serially, LUN Not 0............................... 11 Concurrent Command, Same Initiator, LUN Is 0 ..................... 11 Concurrent Command, Any Initiator, LUN Not 0 ..................... 11 Concurrent Command, Different Initiator, LUN Is 0................. 11
5. 6.
6.1. 6.2. 6.3. 6.3.1. 6.3.2. 6.4. 6.4.1. 6.4.2. 6.5. 6.6.
Status Bytes.....................................................................1 Message System .............................................................1
Message In ........................................................................................ 2 Message Out ..................................................................................... 3 Extended Message............................................................................ 5 Wide Data Transfer Request ..................................................... 6 Synchronous Data Transfer Request Message......................... 8 Message Reject Message Handling................................................ 11 Message-In Phase ................................................................... 11 Message-Out Phase ................................................................ 11 Abort Message Handling ................................................................. 12 Unexpected Bus Free...................................................................... 14
7.
7.1. 7.2. 7.3. 7.4. 7.5. 7.5.1. 7.5.2. 7.6. 7.6.1. 7.6.2. 7.7. 7.8. 7.9.
General Exception Handling...........................................1
Error Codes ....................................................................................... 1 Error Conditions for All Commands ................................................... 5 Deferred Errors .................................................................................. 6 Error Conditions for Media Access Commands ................................ 7 Power On Selftest (POST) Error Handling ........................................ 8 Commands Executed After POST Error .................................... 8 Commands Terminated After POST Error................................. 9 Bus Parity Error Handling .................................................................. 9 Errors Detected by the Drive ................................................... 10 Errors Detected by the Initiator ................................................ 11 Buffer Parity Error Handling............................................................. 11 Error Priority..................................................................................... 12 Suggested Error Recovery Action ................................................... 13
8.
8.1. 8.2. 8.3. 8.4.
Erase ................................................................................1
Command Description ....................................................................... 1 Command Descriptor Block............................................................... 1 Exception Handling............................................................................ 2 Phase Sequencing ............................................................................ 2
9.
9.1. 9.2. 9.3. 9.3.1.
Inquiry ..............................................................................1
Command Description ....................................................................... 1 Command Descriptor Block............................................................... 1 Parameter Lists ................................................................................. 3 Standard Inquiry Data ................................................................ 3
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9.3.2. 9.4. 9.5.
Vital Product Data ...................................................................... 6 Exception Handling.......................................................................... 16 Phase Sequencing .......................................................................... 16
10. Load/Unload.....................................................................1
10.1. 10.2. 10.3. 10.4. Command Description ....................................................................... 1 Command Descriptor Block............................................................... 2 Exception Handling............................................................................ 3 Phase Sequencing ............................................................................ 3
11. Locate...............................................................................1
11.1. 11.2. 11.3. 11.4. Command Description ....................................................................... 1 Command Descriptor Block............................................................... 2 Exception Handling............................................................................ 3 Phase Sequencing ............................................................................ 3
12. Log Select ........................................................................1
12.1. 12.2. 12.3. 12.3.1. 12.3.2. 12.3.3. 12.3.4. 12.3.5. 12.4. 12.5. Command Description ....................................................................... 1 Command Descriptor Block............................................................... 1 Parameter List ................................................................................... 3 General Parameter Description ................................................. 3 Log Page Headers ..................................................................... 3 Log Parameter Headers ............................................................ 3 Modifiable Parameter Values..................................................... 6 The TapeAlert Information Page................................................ 6 Exception Handling......... ...
