Volume label fields

 

The volume labels used in the open feedback area have these fields.

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Table 1. Volume label fields

Offset	Data type	Length	Contents	File type
0	Character	128	Volume label of current volume.	Tape and diskette
128	Character	128	Header label 1 of the opened file.	Tape and diskette
256	Character	128	Header label 2 of the opened file.	Tape

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• IBM standard volume label (VOL1)
  The IBM^® standard volume label (VOL1) is 80 characters in length. The system uses it to identify the tape volume, tape volume owner, and security of the tape volume's contents. It is always the first block of data on the tape volume if the tape is a standard labeled tape.

• IBM standard data set label 1 (HDR1/EOV1/EOF1)
  The IBM standard data set label 1 (HDR1/EOV1/TRL1) is 80 characters in length, and you use it to identify each data set.

• IBM standard data set label 2 (HDR2/EOV2/EOF2)
  The IBM standard data set label 2 (HDR2/EOV2/TRL2) is 80 characters in length and the program uses it to identify additional information about the data set.

• IBM standard user labels (UHL1-UHL8 or UTL1-UTL8)
  The IBM standard user labels (UHL1-UHL8 or UTL1-UTL8) are 80 bytes in length. The program uses them to identify additional information about the data set.

• Other IBM standard labels
  The i5/OS^® operating system only supports IBM standard volume labels, IBM standard data set label 1, IBM standard data set label 2, and IBM standard user labels. However, it reads and ignores volume labels VOL2-VOL8 and file labels HDR3-HDR8 that are created on other operating systems.

• ISO/ANSI standard volume label (VOL1)
  The ISO/ANSI standard volume label (VOL1) is 80 characters in length. The program uses the label to identify the tape volume, tape volume owner, and security of the tape volume's contents.

• ISO/ANSI standard data set label 1 (HDR1/EOV1/EOF1)
  The ISO/ANSI standard data set label 1 (HDR1/EOV1/TRL1) is 80 characters in length and is used to identify each data set. The system records the data set label in ASCII.

• ISO/ANSI standard data set label 2 (HDR2/EOV2/EOF2)
  The ISO/ANSI standard data set label 2 (HDR2/EOV2/TRL2) is 80 characters in length and is used to identify additional information about the data set. The system records the data set label in ASCII.

• ISO/ANSI standard user labels (UHL and UTL)
  The ISO/ANSI standard user labels (UHL and UTL) is 80 bytes in length and is used to identify additional information about the data set.

• Other ISO/ANSI labels
  ISO/ANSI standards also allow up to nine volume labels and up to nine header and trailer labels.

 

Parent topic:

Open feedback area