Guardian Procedure Calls Reference Manual (G06.25+)

Guardian Procedure Calls (C)
Guardian Procedure Calls Reference Manual—522629-013
3-132
CONTROL Procedure
21 Disk, allocate or deallocate extents (write access is
required).
0 deallocate all
extents past the
end-of-file extent
1:
maximum-extents
number of extents to
allocate for a
nonpartitional file
(for DP2 disk files
only)
1:16*number of
partitions
number of extents to
allocate for a
partitioned file
22 Cancel an AM3270 I/O operation. None
24 Magnetic tape, force end-of-volume (EOV). Next
volume in set is requested and current volume is
unloaded.
Valid only for ANSI or IBM label tape.
None
Table 3-5. CONTROL Operations 2 Through 27 (page2of3)
Operation Description Description of <param>