Modifying the auto-configuration
Persistent changes to the auto-configuration can be made only through the hardware interface through which the original device configuration is specified. Such changes are applied with the next reboot.
You can use chzdev with the -d and
--auto-conf options to temporarily remove the auto-configuration for a device.
Example:
# chzdev -d --auto-conf 0.0.ec31
Deconfiguring devices in the auto-configuration only
ECKD DASD 0.0.ec31 deconfigured
Auto-configuration settings are then not applied when the device appears. These configuration changes do not remove the corresponding configuration data on the SE. The auto-configuration data for the device is restored with the next reboot.