IBM System/370 - Page 84

DOS/VS Job Control and Attention Routine Commands (cont'd)
Name
Operation
//
XTENT
!
I
i
I
;
!
Page 4·18
Operand
Remarks
T
'ypo, re"","", '_'I "'"
1 for data area (no
upper I 'serial no. I I
split cylinder)
SYSxxx [,82]
2 for overflow area
(for indexed sequent ia I
i
i
i
I
I
i
i
file)
4 for index area
(for
indexed sequential
file)
128 for data area
(split cylinder)
sequence: sequence number of
extent within multiex-
tent
fi Ie. Can be
0-255
lower:
Lower limit of extent
in the form 8
1
C
1
C
1
C
2
C2C2H1H2H2
where:
8
1
= 0 for 2311 or 2314/
2319;
0-9 for 2321
C
1
C
I
= 00 for 2311 or
2314/2319;
00-19 for
2321
C
2
C
2
C
2
= 000-199 for
2321 or 2314/2319;
000-009 for 2321
H
l
=O
for 2311 or 2314/
2319;
0-4 for 2321
H
2
H
2
= 00-09 for 2311;
00-19 for 2321 or 2314/
2319
Note that the last four
strips of
subcell 19 Ire
reserved for a Itemate
track for 2321
upper:
Upper
limit of extent
in the same form as for
lower limit.
'serial no. ': 6-olphameric-charc-
ter
volume serial number
contained within
apostrophes
SYSxxx:
Can be SYSOOO-SYSnnn
B2: 0 for 2311 or 2314/2319;
0-9 for 2321
Accepted
by
IJ
;
I