Displaying auto-configuration data

Red Hat Enterprise Linux 9.2 LPAR mode

The lszdev command can display auto-configuration data.

Use the lszdev command with the --auto-conf option to display a list of devices for which auto-configuration data is available.

Example:

# lszdev --auto-conf
TYPE       ID        AUTO
dasd-eckd  0.0.ec30  yes
dasd-eckd  0.0.ec31  yes

Auto-configuration settings can be overridden with settings in the persistent configuration. Omit the --auto-conf option to find out for which devices auto-configuration is effective:

Example:

# lszdev
TYPE         ID                          ON   PERS   NAMES
dasd-eckd    0.0.ec30                    yes  yes    dasda
dasd-eckd    0.0.ec31                    yes  auto   dasdb
dasd-eckd    0.0.ec32                    yes  no     dasdc
qeth         0.0.f5f0:0.0.f5f1:0.0.f5f2  yes  no     encf5f0
generic-ccw  0.0.0009                    yes  no

In the example, auto-configuration data is effective for only one device, 0.0.ec31. Effective auto-configuration data is indicated through the value auto in the PERS column of the command output.

The lszdev output for detailed information about a device includes a separate column, AUTOCONF, for auto-configuration data, if available.

Example:

# lszdev -i 0.0.ec31
DEVICE dasd-eckd 0.0.ec31
Names                : -
Modules              : dasd_eckd_mod dasd_mod
Online               : no
Exists               : yes
Persistent           : no
Auto-configured      : yes

ATTRIBUTE                     ACTIVE   PERSISTENT  AUTOCONF
cmb_enable                    "0"      -           -
eer_enabled                   "0"      -           -
erplog                        "0"      -           -
failfast                      "0"      -           -
last_known_reservation_state  "none"   -           -
online                        "1"      -           "1"
raw_track_access              "0"      -           -
readonly                      "0"      -           -
reservation_policy            "ignore" -           -
use_diag                      "0"      -           -

If the AUTOCONF column is omitted, no auto-configuration data is available for this device. You can force the column with the --auto-conf option.

You can access the raw auto-configuration data through sysfs at /sys/firmware/sclp_sd/config/data. For example, you can use this sysfs attribute as a source for importing auto-configuration data with the chzdev command:

# chzdev --import /sys/firmware/sclp_sd/config/data --auto-conf