Defining a Cached DASD as a Dedicated Device

You can give your virtual machine exclusive use of a cached DASD with the DEDICATE directory statement. In your virtual machine's directory, code a DEDICATE directory statement and optionally a DASDOPT directory statement. To dedicate a cached DASD at real device number 199 to virtual device number 199, include these statements in your directory:
DEDICATE 199 199
DASDOPT SYSCTL

If you do not include the DASDOPT directory statement, the default is DEVCTL.