Modifying the auto-configuration

Red Hat Enterprise Linux 8.6 LPAR mode

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.

To refresh the raw auto-configuration in sysfs at /sys/firmware/sclp_sd/config/data, target an echo command at /sys/firmware/sclp_sd/config/reload.

# echo > /sys/firmware/sclp_sd/config/reload

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.