SAS(R) 9.1.3 Companion for z/OS

44 Sequential Access Bound Libraries Chapter 2
after another. The primary purpose of this library implementation, like the sequential
engines it supports, is for storing SAS data sets on sequential devices such as tapes.
Moreover, sequential access bound libraries on z/OS are also internally compatible with
the sequential format libraries used by SAS on CMS, thus providing a way for SAS data
to be interchanged between the two operating environments. Sequential access bound
libraries may extend to multiple volumes, subject only to the limitations of the device
type.
Creating Sequential Access Bound Libraries
The following example shows how to create a new multivolume tape library that
resides on more than five volumes. As the sample JCL DD statement shows, the library
can be assigned externally.
//MYTAPE DD DSN=USER489.TAPE.SASLIB,DISP=(NEW,CATLG,DELETE),
// UNIT=CART,LABEL=(1,SL),VOLUME=(PRIVATE,,,7)
The library data set can also be assigned internal to SAS using the SAS LIBNAME
statement, as is shown in the following example, which is equivalent to the above DD
statement:
libname mytape tape ’user489.tape.saslib’ disp=(new,catlg,delete)
unit=cart label=(1,sl) volcount=7;
Regardless of how the library data set was assigned (either with a DD statement or
with a LIBNAME), specify the libref, or externally assigned DDNAME, as the library in
which a new member is to be created, as is shown in the following example:
R
data mytape.member1; /* new member */
...
Note:
3 The engine ID must be specified when you internally assign a new library on tape.
However, when you externally assign a new library on tape, the value of the
SEQENGINE system option determines the engine that is used to create the
library, unless it is overridden by a LIBNAME statement.
3 The volume count must be specified for a tape library that will extend to more
than five volumes. Refer to the documentation for the VOLUME parameter of DD
stmt in IBM MVS JCL Reference for details.
The following example shows how to create on disk a new, multivolume sequential
access bound library that uses as many as three volumes. As this sample JCL DD
statement shows, the library can be assigned externally:
//SEQDISK DD DSN=USER489.SEQDISK.SASLIB,DISP=(NEW,CATLG),
// UNIT=(3390,3),SPACE=(CYL,(200,200)),BLKSIZE=27998
...
LIBNAME SEQDISK TAPE; /* use TAPE engine */
DATA SEQDISK.MEMB01;
...
The library data set can also be assigned internal to SAS using the SAS LIBNAME
statement, as shown in the following example, which is equivalent to the DD statement
above: