Setting up the System, Tape Management, and Third-Party Products › Define Virtual Devices Using IBM's Hardware Configuration and Definition (HCD) Dialogs

Define Virtual Devices Using IBM's Hardware Configuration and Definition (HCD) Dialogs

You must define a primary and alternate set of Virtual Devices for the system to use as the primary set for virtual tape processing. If a permanent primary set failure is clearable by an IPL only, the primary set is used for virtual tape processing.

To define the Virtual Devices to the operating system, follow the Define I/O Device Data procedure in the IBM Hardware Configuration Definition User's Guide with the following changes:

1. Define the Virtual Devices as 3480s or 3490s because CA Vtape emulates these tape device types.
2. Do not define the devices with control units (CUs) or channel paths (CHPIDs) because they are software devices.
3. On the Define Device Parameters/Features screen, verify the following:
   • Autoswitch is No.
   • Dynamic is Yes.
   • Sharable is No.
   • Compact is Yes.
4. Add the newly defined Virtual Devices to new or existing esoterics for which virtual mounts are desired. We recommend that the system programmer update existing esoterics to avoid JCL changes.
5. Follow the Build a Production IODF procedure in the IBM Hardware Configuration Definition User's Guide to verify your changes and create a new production IODF.
6. Activate the new devices dynamically (software change) for testing.
7. Update SYS1.PARMLIB to reference the new IODF to retain the changes across IPLs.

Note: This information was developed from the IBM z/OS V1R13.0 Hardware Configuration Definition User's Guide. Any change to the HCD software or the Hardware Configuration Definition User's Guide may invalidate this information.

You enter the primary and alternate set of defined devices into the OSDRIVE and VTDRALT Parmlib members. For more information, see the section Initial Configuration of the Parmlib.