DSM/Tape Catalog Operator Interface (MEDIACOM) Manual

Tape Label Formats
DSM/Tape Catalog Operator Interface (MEDIACOM) Manual—429828-010
A-3
IBM-MVS Standard Labels
IBM-MVS Standard Labels
An initialized IBM tape, as defined by the IBM-MVS standard, contains:

A beginning-of-volume label (VOL1)

A beginning-of-file-section label (HDR1)

A tape mark
Once data is written to the tape, a second beginning-of-file-section label, HDR2,
follows the HDR1 label.
Beginning-of-Volume Label
The word Spaces in the Content column indicates fields that HP does not support.
16 to 50 Reserved for System Software Use 35 Spaces
51 to 52 Buffer Offset Length 2 00
53 to 80 Reserved for Future
Standardization
28 Spaces
Table A-4. IBM-MVS VOL1 Label
Character
Position Field Name
Length
in Bytes Content
1 to 3 Label Identifier 3 VOL
4 Label Number 1 1
5 to 10 Volume Serial Number 6 Name of this tape
11 Reserved for Future Standardization 1 Space
12 to 21 VTOC Pointer 10 Spaces
22 to 31 Reserved for Future Standardization 10 Spaces
32 to 41 Reserved for Future Standardization 10 Spaces
42 to 51 Owner Name and Address Code 10 Owner of this tape
52 to 80 Reserved for Future Standardization 29 Spaces
Table A-3. ANSI HDR2 Label (page2of2)
Character
Position Field Name
Length
in Bytes Content