Data sets that CHECK LOB uses
The CHECK LOB utility uses a number of data sets during its operation.
The following table lists the data sets that CHECK LOB uses. The table lists the DD name that is used to identify the data set, a description of the data set, and an indication of whether it is required. Include statements in your JCL for each required data set and any optional data sets that you want to use.
| Data set | Description | Required? |
|---|---|---|
| SYSIN | An input data that contains the utility control statement. | Yes |
| SYSPRINT | An output data set for messages. | Yes |
| UTPRINT | A data set that contains messages from the sort program (usually, SYSOUT or DUMMY). | Yes |
The following object is named in the utility control statement and does not require DD statements in the JCL:
- Table space
- Object that is to be checked.
Sort work data sets cannot span volumes. Smaller volumes require more sort work data sets to sort the same amount of data; therefore, large volume sizes can reduce the number of needed sort work data sets. When you allocate sort work data sets on disk, the recommended amount of space to allow provides at least 1.2 times the amount of data that is to be sorted.
Tape devices are not supported for sort work data sets.