DSM/Tape Catalog Operator Interface (MEDIACOM) Manual

Tape Label Formats
DSM/Tape Catalog Operator Interface (MEDIACOM) Manual—429828-010
A-4
IBM-MVS Beginning-of-File-Section Labels
IBM-MVS Beginning-of-File-Section Labels
The word Spaces in the Content column indicates fields that HP does not support.
Table A-5. IBM-MVS HDR1 Label
Character
Position Field Name
Length
in Bytes Content
1 to 3 Label Identifier 3 HDR
4 Label Number 1 1
5 to 21 Data Set Identifier 17 Tape file ID
22 to 27 Data Set Serial Number 6 Tape name that identifies the entire tape
set
28 to 31 Volume Sequence
Number
4 A number that identifies the order of a
tape within a multitape tape set
32 to 35 Data Set Sequence
Number
4 A number that identifies the order this
tape file was written to the tape set
36 to 39 Generation Number 4 A number indicating the absolute
generation number of this file
40 to 41 Version Number 2 A number indicating the version of this
generation
42 to 47 Creation Date 6 Year and day of the year this file was
created
48 to 53 Expiration Date 6 Year and day of the year this data set
may be scratched or overwritten
54 Data Set Security 1 0
55 to 60 Block Count 6 Number of blocks written in this tape
sequence
61 to 73 System Code 13 Spaces
74 to 80 Reserved for Future
Standardization
7Spaces