NAME(classname) is required on the CLASS statement.
You do not need to specify the volume if the cataloged data set is the desired one. If the data set is not cataloged, or if you have multiple data sets with the same name on different volumes, you must specify VOL(vol). Without the volume serial number, an uncataloged data set is not included in the eligible data set name list. The system issues an informational message to the operator identifying any data sets where the system cannot find the catalog entry to extract the volume.
The vol can be any combination of alphanumeric characters, including @, #, and $, or a dash (-).
Multiple occurrences of the same data set name with different volumes is acceptable. However, if duplicate entries of the same data set name and the same volume occur, the system issues an informational message and ignores the redundant information.
Do not use the EDSN parameter and the EMAJ parameter on the same CLASS statement.
Do not use the EMAJ parameter and the EDSN parameter on the same CLASS statement.
The value for n must be a decimal number from 256 through 524288. You can specify up to six digits, including leading zeros. The maximum value is the maximum data space size. If the system cannot obtain the amount of storage specified on MAXVIRT, it obtains as much as possible.
If the value for n is not in the valid range, the system uses 16 megabytes (4096 4K blocks.)
Default Value: MAXVIRT(4096)
Default Value: ALERTAGE(60)
Note that the higher the ALERTAGE value you specify, the more likely it is that the VLF_MAXVIRT check will issue an exception message. See the check description for VLF_MAXVIRT in IBM Health Checker for z/OS User's Guide for more information.