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The DYNVOL Control-M/Tape installation parameter indicates how automatic check-in of volumes should be performed. When automatic check-in is activated, if a job attempts to access a volume that is not defined in the Media Database, Control-M/Tape checks the value specified for the DYNVOL parameter and proceeds accordingly. Valid values for the DYNVOL parameter are:
Table 25 Values for the DYNVOL Parameter
Value |
Description |
|---|---|
P |
A message is displayed prompting the operator to specify if a volume record should be added to the Media Database. |
E |
A volume record is added to the Media Database and the volume is marked as an External Volume. No message is sent to the operator. |
Y |
A volume record is added to the Media Database. The volume is not marked as an external volume. No message is sent to the operator. |
I |
The volume is ignored. Processing of the job continues without the intervention of Control-M/Tape. No information is recorded in the Media Database regarding the volume or the data sets contained in that volume. (This value produces a result similar to the JCL parameter EXPDT=98000.) |
N |
The volume definition is not added to the Media Database and the job abends for specific tape requests, or the tape is rejected for nonspecific (scratch) requests. |
Note: Some tape management systems allow external volumes to be manually checked in. However, even these systems do not properly protect external volumes (for example, by preventing files from being overwritten). When a volume definition is added to the Media Database during the automatic check-in process, retention information is obtained from the corresponding JCL statement, a default Control-M/Tape rule definition ($DEFAULT), or the default retention period specified through the DEFEXPDT Control-M/Tape installation parameter.
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