Provided by: ledmon_0.90-0ubuntu1~18.04.1_amd64 
NAME
ledctl - Intel(R) LED control application for a storage enclosures.
SYNOPSIS
ledctl [OPTIONS] pattern_name=list_of_devices ...
DESCRIPTION
The ledctl is an user space application designed to control LEDs associated with each slot in an
enclosure or a drive bay. The LEDs of devices listed in list_of_devices are set to the given pattern
pattern_name and all other LEDs are turned off. User must have root privileges to use this application.
There are two types of systems: 2-LEDs systems (Activity LED, Status LED) and 3-LEDs systems (Activity
LED, Locate LED, Fail LED). The ledctl application uses SGPIO and SES-2 protocol to control LEDs. The
program implements IBPI patterns of SFF-8489 specification for SGPIO. Please note some enclosures do not
stick close to SFF-8489 specification. It might happen that enclosure's processor will accept an IBPI
pattern but it will blink the LEDs at variance with SFF-8489 specification or it has limited number of
patterns supported.
LED management (AHCI) and SAF-TE protocols are not supported.
The ledctl application has been verified to work with Intel(R) storage controllers (i.e. Intel(R) AHCI
controller and Intel(R) SAS controller). The application might work with storage controllers of other
vendors (especially SCSI/SAS controllers). However, storage controllers of other vendors have not been
tested.
The ledmon application has the highest priority when accessing LEDs. It means that some patterns set by
ledctl may have no effect if ledmon is running (except Locate pattern).
The ledctl application is a part of Intel(R) Enclosure LED Utilities.
Pattern Names
The ledctl application accepts the following names for pattern_name argument according to SFF-8489
specification.
locate Turns Locate LED associated with the given device(s) or empty slot(s) on.
locate_off
Turns only Locate LED off.
normal Turns Status LED, Failure LED and Locate LED off.
off Turns only Status LED and Failure LED off.
ica or degraded
Visualizes "In a Critical Array" pattern.
rebuild Visualizes "Rebuild" pattern.
ifa or failed_array
Visualizes "In a Failed Array" pattern.
hotspare
Visualizes "Hotspare" pattern.
pfa Visualizes "Predicted Failure Analysis" pattern.
failure or disk_failed
Visualizes "Failure" pattern.
ses_abort
SES-2 R/R ABORD
ses_rebuild
SES-2 REBUILD/REMAP
ses_ifa SES-2 IN FAILED ARRAY
ses_ica SES-2 IN CRIT ARRAY
ses_cons_check
SES-2 CONS CHECK
ses_hotspare
SES-2 HOT SPARE
ses_rsvd_dev
SES-2 RSVD DEVICE
ses_ok SES-2 OK
ses_ident
SES-2 IDENT
ses_rm SES-2 REMOVE
ses_insert
SES-2 INSERT
ses_missing
SES-2 MISSING
ses_dnr SES-2 DO NOT REMOVE
ses_active
SES-2 ACTIVE
ses_enable_bb
SES-2 ENABLE BYP B
ses_enable_ba
SES-2 ENABLE BYP A
ses_devoff
SES-2 DEVICE OFF
ses_fault
SES-2 FAULT
ses_prdfail
SES-2 PRDFAIL
Patterns Translation
When non SES-2 pattern is send to device in enclosure automatic translation is being done.
locate locate is translated to ses_ident
locate_off
locate_off is translated to ~ses_ident
normal or off
normal or off is translated to ses_ok
ica or degraded
ica or degraded is translated to ses_ica
rebuild rebuild is translated to ses_rebuild
ifa or failed_array
ifa or failed_array is translated to ses_ifa
hotspare
hotspare is translated to ses_hotspare
pfa pfa is translated to ses_prdfail
failure or disk_failed
failure or disk_failed is translated to ses_fault
List of Devices
The application accepts a list of devices in two formats. The first format is a list with comma separated
elements. The second format is a list in curly braces and elements are separated by space. See examples
section bellow for details.
A device is a path to file in /dev directory or in /sys/block directory. It may identify a block device,
a RAID device or a container device. In case of a RAID device or a container device a state will be set
for all block devices associated, respectively.
The LEDs of devices listed in list_of_devices are set to the given pattern pattern_name and all other
LEDs are turned off (unless --listed-only option is given).
OPTIONS
-l or --log=path
Sets a path to local log file. If this option is specified the global log file
/var/log/ledctl.log is not used.
-h or --help
Prints this text out and exits.
-v or --version
Displays version of ledctl and information about the license and exits.
-L or --list-controllers
Prints information (system path and type) of all controllers detected by ledmon and exits.
-x or --listed-only
With this option ledctl will change state only on devices listed in CLI. The rest of devices will
not be touched.
FILES
/var/log/ledctl.log
Global log file, used by all instances of ledctl application. To force logging to user defined
file use -l option switch.
EXAMPLES
The following example illustrates how to locate a single block device.
ledctl locate=/dev/sda
The following example illustrates how to turn Locate LED off for the same block device.
ledctl locate_off=/dev/sda
The following example illustrates how to locate disks of a RAID device and how to set rebuild pattern for
two block devices at the same time. This example uses both formats of device list.
ledctl locate=/dev/md127 rebuild={ /sys/block/sd[a-b] }
The following example illustrates how to turn Status LED and Failure LED off for the given device(s).
ledctl off={ /dev/sda /dev/sdb }
The following example illustrates how to locate a three block devices. This example uses the first format
of device list.
ledctl locate=/dev/sda,/dev/sdb,/dev/sdc
LICENSE
Copyright (c) 2009-2017 Intel Corporation.
This program is distributed under the terms of the GNU General Public License as published by the Free
Software Foundation. See the built-in help for details on the License and the lack of warranty.
SEE ALSO
ledmon(8), ledmon.conf(5)
AUTHOR
This manual page was written by Artur Wojcik <artur.wojcik@intel.com>. It may be used by others.