Initialize KSDS/RRDS

​Use the Initialize KSDS/RRDS function (option I) to initialize a VSAM or IAM KSDS or RRDS data set. Initializing the data set writes and then deletes an empty record so that the data set has a non‑zero HIGH‑USED RBA value. This ensures the cluster is ready for further processing.

Initializing a KSDS or RRDS cluster

To initialize a KSDS or RRDS cluster, perform the following steps:

1. Enter I in the OPTION field.
2. Specify the cluster data set name.
3. Set the processing option to O (Online) or B (Batch).

Processing option O (Online)

Press Enter for File‑AID to initialize the data set immediately.

• If the initialization is successful, File‑AID displays the message DATASET INITIALIZED.
• If an error occurs (for example, if the cluster is not empty), File‑AID displays an appropriate error message.

Processing option B (Batch)

1. Press Enter for File‑AID to generate JCL to perform a File‑AID Batch VSAMINIT.
   The JCL Specification screen appears.
2. Submit the JCL using the SUB primary command. Alternatively, you can display or edit the JCL using the JCL primary command.

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