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IBM System/360 System Programmer's Guide

IBM System/360
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set
be
removed
from
the
catalog.
DSNAME,
the
second
operand,
specifies
the
main
storage
location
of
an
area
into
which
you
have
placed
the
fully
qualified
name
of
the
data
set
whose
references
are
to
be
removed.
HOW
TO
RECATALOG
A
DATA
SET
You
recatalog
a
cataloged
data
set
by
using
the
CATALOG
and
CAMLST
macro-instructions.
Recataloging
is
usually
performed
when
new
volume
pointers
must
be
added
to
the
volume
list
of
a
data
set.
You
must
build
a
complete
volume
list
in
main
storage.
This
volurre
list
consists
of
volume
pointers
for
all
volumes
on
which
the
data
set
is
stored.
The
first
two
bytes
of
the
list
indicate
the
number
of
volume
pointers
that
follow.
Each
12-byte
volume
pointer
consists
of
a
4-byte
device
code,
a
6-byte
volume
serial
number,
and
a
2-byte
data
set
sequence
number.
The
sequence
number
is
always
zero
for
direct-access
volumes.
(Device
codes
are
contained
in
Appendix
B
of
this
chapter.)
Example:
In
the
following
example,
the
data
recataloged.
A new
volume
pointer
is
added
to
the
previously
contained
only
two
volume
pointers.
set
named
A.B.C
is
volume
list,
which
r---------T----------T-------------------------------------------------,
I Name I
Operationl
Operand
I
~---------+----------+-------------------------------------------------~
RECATLG
DSNAME
VOLUMES
CATALOG
I
RECATLG
RECATALOG
DATA
SET
A.B.C,
Check
Exceptional
Returns
ADDING
A
NEW
VOLUME
POINTER
TO
THE
VOLUME
CAMLST
RECAT,DSNAME"VOIUMES
LIST.
DC
CL6'A.B.C'
ONE
BLANK
FOR
DELIMITER
DC
H'
3'
THREE
VOLUMES
DC
X'30002001'
2311
DISK
STORAGE
DC
CL6'000014'
VOLUME
SERIAL
NUMBER
DC
H'
0'
SEQUENCE
NUMBER
DC
X'30002001'
2311
DISK
STORAGE
DC
CL6'OOOOlS'
VOLUME
SERIAL
NUMBER
DC
H'O'
SEQUENCE
NUMBER
DC
X'30002001'
2311
DISK
STORAGE
DC
CL6'000016'
VOLUME
SERIAL
NUMBER
DC
H'O'
SEQUENCE
NUMBER
---------~----------~-------------------------------------------------
The
CATALOG
macro-instruction
points
to
the
CAMLST
macro-instruction.
RECAT,
the
first
operand
of
CAMLST,
specifies
that
a
data
set
be
recataloged.
DSNAME,
the
second
operand,
specifies
the
wain
storage
location
of
an
area
into
which
you
have
placed
the
fully
qualified
name
of
the
data
set
to
be
recataloged.
VOLUMES,
the
fourth
operand,
specifies
the
main
storage
location
of
the
volume
list
you
have
built.
HOW
TO
READ
A
DATA
SET
CONTROL
BLOCK
FROM
THE
VOLUME
TABLE
OF
CONTENTS
You
can
read
a
data
set
control
block
(DSCB)
into
main
storage
by
using
the
OBTAIN
and
CAMLST
If-acro-instructions.
There
are
two
waY3
to
specify
the
DSCB
that
you
want
read:
by
using
the
name
of
the
data
set
associated
with
the
DSCB,
or
by
using
the
atsolute
track
address
of
the
DSCB.
When
you
specify
the
name
of
the
data
set,
a
forroat
1
DSCB
is
read
into
main
storage.
To
read
a
DSCB
other
than
a
format
1 LSCB,
you
must
specify
an
absolute
track
address.
<DSCB
formats
and
field
descriptions
are
contained
in
the
System
control
Block
publication).
18

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IBM System/360 Specifications

General IconGeneral
BrandIBM
ModelSystem/360
CategoryDesktop
LanguageEnglish

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