Labeled Backup Tape Volume Labels; Using Defines For Labeled Backup Tapes; Permissible Define Attributes For Labeled-Tape Backup - HP BACKCOPY Reference Manual

Labeled Backup Tape Volume Labels

For labeled backup tapes, BACKUP writes either an IBM volume label or a customized ANSI volume
label (the BACKUP label) at the beginning of the tape.
The 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
The initialized ANSI tape, as defined in the ANSI standard, contains:
◦
A beginning-of-volume label (VOL1)
◦
A beginning-of-file-section label group (HDR1, HDR2)
◦
Two tape marks
◦
An end-of-file label group (EOF1,EOF2)
◦
Two tape marks
NOTE: The BACKUP label type is a customized version of the ANSI label. The labels are identical
except character 80 (from the BACKUP label) is a B instead of a 3. When BACKUP writes to a
scratch ANSI labeled tape, it changes it into the BACKUP label type.
Following this volume label, BACKUP writes all labeled backup tapes in tape format 3. Therefore,
the files on a labeled backup tape are not in the standard labeled tape format (ANSI or IBM).

Using DEFINEs for Labeled Backup Tapes

You must specify a CLASS TAPE DEFINE (instead of a tape device name) in the BACKUP command
to use a labeled backup tape. You create the DEFINE in the same way you create DEFINEs for
ANSI and IBM labeled tapes. If you are not familiar with labeled-tape processing on NonStop
systems (or with DEFINEs), see the Guardian User's Guide. It gives instructions on using different
DEFINEs including CLASS TAPE DEFINEs for labeled-tape processing.
The two differences between using TAPE DEFINEs for backup labeled tapes and for ANSI and IBM
tapes are:
You can use only a subset of the CLASS TAPE attributes for a backup labeled tape. The
supported attributes are summarized in
attributes, see
You must specify the LABELS attribute as either BACKUP or IBMBACKUP.
Table 1 1 Permissible DEFINE Attributes for Labeled-Tape Backup
Attribute
CLASS
DEVICE
DENSITY
EXPIRATION
FILEID
78 BACKUP
Appendix E: CLASS TAPE
Use Description
Required Must be specified as TAPE.
Optional Specifies the tape drive to use.
Optional Specifies tape density. If the DENSITY option is specified in the BACKUP
command, it must match this value, and only an open reel tape can be
used.
Optional Specifies the month, day, and year after which this tape can be
overwritten.
Optional/ Required Specifies the name of the tape (file) set. Optional for LABELS BACKUP;
required for LABELS IBMBACKUP.
Table 1 1. For a complete description of these DEFINE
DEFINEs.