DSUNIT keyword

Global and database-specific options modules. Optional on the following control statements; the control statement on which you specify this keyword determines the input data sets that are affected:

• ACCUM—change accumulation
• AREC—logs, image copy, and change accumulation
• GLBL—logs, image copy, and change accumulation
• GROUP—image copy and change accumulation
• LOG—logs
• REC—logs, image copy, and change accumulation

None

The syntax is as follows:

DSUNIT(unitname)

DSUNIT(*)

DSUNIT(,nn)

DSUNIT(unitname,nn)

DSUNIT(*,nn)

Use DSUNIT(unitname) or DSUNIT(*) in conjunction with DSALLOC(Y) to specify the unit name for input image copy, change accumulation, and log data sets. The Recovery utility ignores the unit name specified with DSUNIT when DBRC is defined with CATDS and the input data set is cataloged. See User-exits for another technique of setting the unit name based on installation defined criterion.

Volume serial and file sequence numbers for input data sets are retrieved from DBRC unless IMS is defined with CATDS and the data set is cataloged.

Use DSUNIT(,n) in conjunction with DSALLOC(Y) to specify the number of devices to use for multiple volume input image copies, change accumulation data sets, or log data sets. For image copies and change accumulation data sets, the number actually allocated is never more than the number of volumes. For a tape device type, the Recovery utility automatically limits the count to 2.

Use DSUNIT(unitname,nn) or DSUNIT(*,nn) to specify both subparameters described above.

Specify the following values as indicated in the syntax:

• unitname—1-8 characters
• , nn—numeric 1-59
• *—Dynamically allocate the unit name for the image copy, change accumulation, and log data sets.

The defaults are as follows:

• unitname—None
• , nn—DSUNIT(,1)