The unit verification service (IEFEB4UV routine) enables you to
obtain information from the eligible device table (EDT) and to check
your device specification against the information in the EDT. See z/OS HCD Planning for information on the EDT.
The unit verification service performs the following functions:
- Check groups
- Check units
- Return unit name
- Return unit control block (UCB) addresses
- Return group ID
- Indicate unit name is a look-up value
- Return look-up value
- Convert device type to look-up value
- Return attributes
- Specify subpool for returned storage
- Return unit names for a device class