User's Manual

XEROX LASER PRINTING SYSTEMS TAPE FORMATS MANUAL 2-1
2. 2IBM OS/360 and DOS/360
standard labeled tapes
This chapter describes the standard labeled tapes for the IBM OS/
360 and DOS/360.
IBM labeled tapes
The Xerox/OSS accepts any of the following IBM 360 9-track tapes:
• ANSI labeled tapes created under OS/360
• OS/360 standard labeled tapes
• DOS/360 standard labeled tapes
• Nonstandard unlabeled tapes whose data files conform to the
record format, blocking factor, and carriage control
requirements as described within this section.
OS/360 ANSI labeled tapes
ANSI labeled tapes created under OS/360 conform to ANSI Standard
X3.27—1969. These tapes always have the HDR2, EOF2, and
EOV2 labels.
The EOF2 and EOV2 labels are always identical to the HDR2 and the
actual count in EOF2 and EOV2. The recording code for both labels
and data files is ASCII.
IBM standard labeled tapes
OS/360 and DOS/360 standard labeled tapes are similar in principle
to ANSI labeled tapes but differ enough in detail to require separate
processing. The labels created by these operating systems and,
optionally, by users, are shown in table 2-1. The location of these
labels in the various tape configurations are illustrated in figures 2-1
and 2-2.
Table 2- 1. IBM OS/360 and DOS/360 tape labels
Class and originator
Type OS/360 DOS/360 User (optional)
Beginning-of-volume VOL1 VOL1 OS: None permitted
DOS:VOL2—VOL8.
Beginning-of-file HDR1, HDR2 HDR1 UHL1—UHL8
End-of-volume EOV1, EOV2 EOV1 UTL1—UTL8
End-of-file EOF1, EOF2 EOF1 UTL1—UTL8