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DSM/TC Tape Processing
DSM/Tape Catalog User’s Guide — 520233-008
3 - 10
DSM/TC Interaction With $ZSVR
replacement tapes during audit dump restoration if multiple parallel or serial audit
dumps were performed, use the MEDIACOM ALTER TAPEMOUNT request.
DSM/TC Interaction With $ZSVR
To use MEDIACOM commands effectively, you should understand how the NonStop
Kernel tape server process, $ZSVR, and DSM/TC interact with each other.
How Users Request Labeled Tapes
As a user of labeled tapes (a requestor), you must first create a TAPECATALOG
DEFINE for each tape file to be accessed. The DEFINE contains attributes describing
the tape file, such as the file ID, and the operation, such as input or output. If the
application program you are using is coded to expect certain DEFINE names, you must
give those names to the DEFINEs you create.
After creating the DEFINEs, you can run your application program, specifying the
DEFINE names in the run command.
How $ZSVR Manages Tape Requests
When an application opens a file described by a DEFINE:
1. An open request is sent to $ZSVR through the file system. The request contains
the information from the DEFINE.
2. $ZSVR must know which tape can satisfy the request. It makes one of these
requests of DSM/TC:
Find the tape that contains the cataloged tape file ID named in the DEFINE.
Verify that the tape named in the DEFINE contains the cataloged tape file ID in
the DEFINE.
Select an available scratch tape from the pool specified in the DEFINE.
Otherwise it uses the currently loaded tape and appends another backup job to
the same tape media if the tape is defined as appendable.
Verify that the scratch tape named in the DEFINE is a cataloged scratch tape.
3. $ZSVR uses Automatic Volume Recognition (A
VR) to find the drive on which the
tape approved by DSM/TC is mounted.
If the tape is already mounted, meaning the operator put the tape on a drive
before a mount message was generated for it, $ZSVR immediately connects
the tape drive to the application so it can use the tape.
If the tape is not mounted:
a. $ZSVR checks if another mounted t
ape can satisfy the request. If so,
$ZSVR proceeds to Step d.
- DSM/Tape Catalog 1
- User’s Guide 1
- Document History 2
- Legal Notices 3
- DSM/Tape Catalog User’s Guide 5
- 2. Tape File Concepts 6
- 3. DSM/TC Tape Processing 6
- 4. Role-based flexibility 6
- 5. Configuring DSM/TC 6
- Library Control Path 8
- 9. Database Design of DSM/TC 9
- Contents 10
- What’s New in This Manual 11
- Changes in the H06.13 RVU: 12
- Changes in the G06.23 Manual 12
- About This Manual 13
- Related Publications 14
- Notation Conventions 14
- General Syntax Notation 15
- Notation for Messages 17
- Change Bar Notation 19
- 1 Introduction to DSM/TC 21
- Main Components of DSM/TC 22
- TAPECOM Users 23
- Volume Catalog 23
- Status Changes 24
- Multiple Volume Catalogs 25
- Tape Pools 26
- Append Capable Pools 27
- Tape Volumes 28
- SCRATCH media selection 29
- Tape Files 30
- Disk Files 30
- File Catalog 30
- Introduction to DSM/TC 31
- The CLASS TAPECATALOG DEFINE 32
- Multiple File Catalogs 32
- Volume-Mode Backup 34
- File-Mode Backup 35
- The BACKCOPY Utility 35
- DSM/TC System Terms 36
- System Search Space 37
- Current Default Node 37
- 2 Tape File Concepts 41
- Tape File Concepts 42
- File Generations 42
- Absolute Generations 43
- Relative Generations 43
- Tape File Version 45
- File Retention Period 46
- MASTER_OUT 1 0 Valid 49
- MASTER_OUT 2 0 Valid 49
- MASTER_OUT 3 0 Invalid 49
- MASTER_OUT 3 1 Valid 49
- Tape File Expiration 50
- SQL Warning Message 6008 51
- 3 DSM/TC Tape Processing 53
- Labeled Tapes 54
- Volume Set 54
- DSM/TC Tape Processing 55
- Copies of TMF Tape Volumes 61
- DSM/TC Interaction With $ZSVR 62
- Premounted Output Tapes 65
- Substituting Scratch Tapes 66
- Using VOLUME (Tape Name) 67
- 4 Role-based flexibility 71
- Troubleshooting 72
- Role-based flexibility 73
- 5 Configuring DSM/TC 75
- Task 4. Start $ZSVR 76
- (MEDIADBM) 77
- Creating Volume Catalogs 78
- Creating Pools 79
- MEDIACOM 80
- Default File Catalog 81
- Default Volume Catalog 81
- Default Pool 81
- Default Retention 81
- The Expiration Process 82
- Monitoring the System Date 82
- Default Abend Retention 83
- System Search List 83
- Data Compression 83
- Configuring DSM/TC 84
- Default NL and BLP Behavior 86
- Adding Preexisting Tape Files 90
- Using TAPECATALOG DEFINE 93
- EXPIRATION { mmmddyyyy } 97
- { ddm 97
- TAPECATALOG DEFINE Examples 104
- Labels OMITTED 105
- Labels BYPASS 105
- General Examples 106
- Tape Library Control Path 109
- Configuration Guidelines 109
- Scratch Tapes 110
- Configuring Compression 112
- Tape Library 113
- Automatic Operation 115
- Mount Requests 115
- Control Path Flow Description 115
- Related Reading 118
- Using Tapes in a Tape Library 119
- TAPECATALOG DEFINE Requests 120
- (With Catalog) 121
- Catalog) 122
- User Request Operations 123
- TMF Operations 123
- Run-Time Configuration 126
- Environment Variables 126
- Startup Sequence 127
- Running the Portmapper 128
- Examples 129
- Considerations 129
- Using the RPCINFO Utility 130
- Tape Library Error Diagnosis 132
- Nonretryable Errors 133
- Control Path 134
- 9 Database Design of DSM/TC 135
- Restoring Disk Files 136
- Updating the DSM/TC Database 136
- The Catalog Manager Process 136
- Database Design of DSM/TC 137
- Guidelines 138
- TapefileConfig Table 139
- Applicable Access Key 139
- Tapefile Table 140
- Applicable Access Keys 141
- Tapefile-to-Volume Table 141
- Diskfile Table 142
- Diskfile-to-Volume Table 144
- Pool Table 145
- Volume Table 146
- Volume-to-FileCatalog Table 147
- Shorthand Views 148
- Setting the System Defaults 151
- Creating the Default Catalogs 152
- Adding Pools 153
- Labeling New Tapes 154
- Performing Operational Tasks 155
- BACKUP Information Output 162
- Recovering a Subvolume 165
- Rejecting a Tape Mount 166
- CLASS TAPECATALOG DEFINE 169
- Syntax Summary 169
- VERSION { version 170
- Consistency Checks 171
- CLASS TAPE DEFINE to CLASS 173
- TAPECATALOG DEFINE Conversion 173
- DEFINE Conversion 174
- CLASS TAPE/TAPECATALOG 175
- DEFINE Equivalent Attributes 175
- Attributes 176
- Index - 1 177
- Index - 2 178
- Index - 3 179
- Index - 4 180
- Index - 5 181
- Special Characters 182
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