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3480
User reference
IBM 3480 User Reference
Magnetic tape subsystem
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Contents
Table of Contents
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Table of Contents
Table of Contents
Chapter 1 Chapter The IBM 3480 Magnetic Tape Subsystem
IBM 3480 Magnetic Tape Subsystem Operating Mode
Conventions Used
Chapter 2. Tape Characteristics
Changed Format of IBM Standard Data Set Label 2 (HDR2/EOV2/EOF2)
Chapter 3. Modifying Existing Code in MVS Systems
Selecting Data Set Options
DCB Parameters
Coding the Block Size and Logical Record Length Operands
Constructing a Data Control Block
Specifying JCL Options
Modifying the Job File Control Block (JFCB)
Setting the Header Label Block ID in the JFCB for High-Speed Search
Example of How to Code OPEN(J)
MVS Block Count Checking
User Exits
EXCP Routines
User Programs
Performance Options for IEBGENER
IEBGENER Storage Requirements
Chapter 4. Controlling the 110 Device
Controlling High-Speed Search (NOTE/POINT)
How the Physical Block Identifier Works
Retrieving the BLOCKID
Performing the High-Speed Search
Comparing Conventional Search and High-Speed Search
Examples of How to Code NOTE and POINT
NOTE-Provide Relative Position (BPAM and BSAM)
Completion Codes from NOTE
POINT-Moving Tape to a Relative Block Position (BPAM and BSAM)
Completion Codes from POINT
Controlling Data Synchronization (SYNCDEV)
Example of How to Code SYNCDEV
SYNCDEV-Synchronize Device
SYNCDEV-List Form
SYNCDEV-Execute Form
Completion Codes from SYNCDEV
Obtaining I/O Device Characteristics (DEVTYPE)
Chapter 5. Displaying Messages (MSGDISP)
Displaying a Message from any User Program (MSGDISP RDY)
Example of How to Code MSGDISP RDY
MSGDISP-Displaying a Ready Message
MSGDISP-Displaying a Ready Message List Form
MSGDISP-Displaying a Ready Message Execute Form
Displaying a Message from Authorized Programs
MSGDISP-Displaying a Mount Message
MSGDISP-Displaying a Verify Message
MSGDISP-Displaying a Demount Message
MSGDISP-Resetting the Message Display
MSGDISP-Providing the Full Range of Display Options
Return Codes from MSGDISP
Modifying MSGDISP for Other Languages
Chapter 6. Managing and Controlling Data Sets
Specifying Esoteric Unit Names
Recycling Tapes
Establishing or Changing the Values Ofdfhsm Control Parameters (SETSYS)
Specifying the Tape Density When Allocating Scratch Tapes (DENSITY)
Specifying the Type of Unit for Mounting a Scratch Tape (UNITNAME)
Specifying Esoteric Tape Unit Name to DFHSM (USERUNITTABLEINOUSERUNITTABLE)
Adding or Changing the Volumes Managed by DFHSM (ADDVOL)
Specifying the Type of Device (UNIT)
Specifying the Tape Density (DENSITY)
Chapter 7. Recording Error or Statistical Information
Using EREP Reports
Using Error Recovery Procedures (ERP)
Using IMS/VS Logging
Chapter 8. Restrictions to Using Sorting Applications (DFSORT)
Sortwknn DD Statement
SORTOUT DD Statement
Appendix A. Data Control Block Symbolic Field Names
Magnetic Tape Interface
Appendix B. Programming Messages and Codes
Return Code from the CHKPT Macro Instruction for the 3480
ABEND Completion Codes Issued by Checkpoint/Restart for the 3480
Glossary
Index
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