IBM System/360 System Programmer's Guide

r-------------T---------------T------~-T-------------------------------,
I I ITransferl I
I
Program IMounted Volume IOccurs I I
ISpecificationlCharacteristicslon a IPossible Editor Routine Action I
~-------------+-.--------------+--------+-------------------------------~
ISL - 800 or ISL -- CD I DC1 I Overwrite the standard labell
11600 BPI 1 I Iwith a standard latel. Thel
I density I I Ifirst write from loadpoint sets 1
I I I
Ithe recording density on al
I I I Idual-density device. (See Fig-I
I I I lure 7 or 8 -- blocks 15b, 161
I I I
land explanation). I
~-------------+---------------+--------+-------------------------------~
INSL2 - 800 orlNSL O~ NL -- COl DC1 IWrite a tapemark to set den-I
11600BPI 1 I Isity. The prograre specifica-I
I density I I Ition NSL will cause control tol
I I I Ibe given to your nonstandard I
I I I I label routines after return tol
I I 1 IOPEN or BOV. (See Figure 7 -I
I I I I blocks 15, lSb, 16. If your I
I I I linstallation supports protec-I
I I I Ition and retention data check-I
I I I ling NSL volumes, see block 6). I
t-------------+---------------+--------+--------------------------------~
ISL INSL or NL3 I LC IWrite a standard volume label. I
I I I I
(See Figure 7 - blocks 15, lSa,1
I I I 1
1
6. If your installation sup-I
I I I Iports protection and retention I
I I I Idate checking on NSL volumes, I
I I I I
see block 6). I
~-------------+---------------+--------+-------------------------------~
INL or NSL ISL3 I LC IOverwrite standard label with al
I I I Itapemark, i.e. "cancel." (Seel
I I I IFigure 7 - blocks 15, 15a, 16).1
I I I IDepending on whether NL or NSLI
I
I I I is specified by the program, I
I I I IOPEN
or EOV will either posi-I
I I I Ition tape (NL) or transfer con-I
I I I Itrol to your nonstandard labell
I I I I routines (NSL) when control isl
I I I I returned to them. I
~-------------~--,-------------~--------~-------------------------------~
Legend:
SL - standard volume label
NSL - nonstandard volume label
NL - no volume label
DC - density check
LC - label check
CD - Conflicting density. The volume has teen previously written
on, or in a, recording density other than that specified by the
program. The recording density on a dual-density device is set
by sensing the density of the mounted volume.
1Dual-Density devices only.
2If NL is specified, no density check is performed. For NL volumes,
tape is positioncQ at load point and recording density is set by the
first write command. .
3If the volume is mounted on a dual-density device a density condition
way also exist. If will Le corrected ny the write operation.
Note: The OPEN and EOV routines position the tape at load point before
I transferring control to the editor routines.
L _____________________________________ ~ ________________________________ J
Figure 6. Editor Routine Entry Conditions
Label Processing Routines 57

IBM System/360 Specifications

General

Brand	IBM
Model	System/360
Category	Desktop
Language	English