If dual mirror image file processing is used, it is possible to immediately recover a damaged file. The dual file is an exact copy of the main file. The recovery procedure uses utility IOADCPY to copy the entire dual file to the main file or vice versa. Before starting the recovery procedure, make a backup copy of the main file and the Dual file.
If the Main file is damaged, perform the following recovery steps:
Stop all Control‑D related activities (Control‑D monitor, online activities, batch utilities).
Delete all extents of the Data component of the main copy only. For example, to delete all the extents of the Active User Report List file, list all the files with prefix CTD.ACT.E* and delete them.
Run the IOADCPY utility with parameter SUFFIX set to the Dual file (D000). For an example, see sample member CTDUFCPY in the Control‑D JCL library.
Rebuild the Index component (see the preceding topic).
Restart all Control‑D activities.
If the Dual file is damaged, perform the following recovery steps:
Stop all Control‑D related activities (Control‑D monitor, online activities, batch utilities).
Delete all extents of the Data component of the Dual copy only. For example, to delete all the extents of the Control‑D Active User Report List file, list all the files with prefix CTD.ACT.D* and delete them.
Run the IOADCPY utility with parameter SUFFIX set to the Main file (E000). For an example, see sample member CTDUFCPY in the Control‑D JCL library.
Rebuild the Index component.
Restart all Control‑D activities.
For more information about IOA Access Method utilities for User Report List files, see the INCONTROL for z/OS Utilities Guide.
