Ubuntu Manpage: ledctl - Intel(R) LED control application for a storage enclosures.

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 supports LED management of the SAS/SATA and PCIe storages.

Supported protocols/methods for LED management are:

• SES-2 and SMP for SAS devices,

• LED messages over SGPIO for SATA,

• VMD and NPEM for PCIe.

SAF-TE protocol is not supported.

For SAS/SATA storages supporting controllers may transmit LED management information to the backplane
controllers via the SGPIO interface. The SGPIO bus carries bit patterns, which translate into LED blink
patterns in accordance with the International Blinking Pattern Interpretation (IBPI) of SFF-8489
specification for SGPIO. Please note some enclosures do not stick close to the SFF-8489 specification.
It might happen that the enclosure processor will accept the IBPI pattern but it will blink LEDs not
according to SFF-8489 specification or it has a limited number of patterns 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.

The ledctl utilizes the following documents as references:

• SGPIO (Serial GPIO) - SFF-8485

• IBPI (International Blinking Pattern Interpretation) - SFF-8489

• LED Enclosure management messages - AHCI specification rev 1.3, section 12.2.1.

• SAS (Serial Attached SCSI) - T10/1760-D

• SES-2 (SCSI Enclosure Services-2) - T10/1559-D

• SMP (Serial Management Protocol) - T10/1760-D

• NPEM (Native PCIe Enclosure Management) - PCIe base specification rev 4.0

• VMD (Intel(R) Volume Management Device) - Intel(R) VROC (VMD NVMe RAID) Quick

Configuration Guide rev 1.2

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) 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 below for details.

A device is a path to file in /dev directory or in /sys/block directory.

The LEDs of devices listed in list_of_devices are set to the given pattern pattern_name and all other
LEDs, on all devices, 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.

-P or --list-slots --controller-type=controller-type
Prints all slots for the controller type. Slot definition depends on the controller and is unique
across all controllers of the same type.

Definitions for supported controller types are described below:

• VMD - PCI Express Hot Plug Controller Driver slot number

• NPEM - PCI Express Downstream Port address

Command returns a list of all slots for the controller type with current state and attached
device name (if any). controller-type is type of controller (vmd, NPEM) that should be scanned
here.

-G or --get-slot --controller-type=controller-type --device=device
Displays slot details of given device. device is devnode of selected drive.

-G or --get-slot --controller-type=controlle-typer --slot=slot
Displays details of given slot. slot is unique slot identifier.

-S or --set-slot --controller-type=controller-type --slot=slot --state=IBPI_state
Changes led state for given slot. controller-type is type of the controller. slot is unique slot
identifier. IBPI_state is led pattern.

-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.

--quiet or --error or --warning or --info or --debug or --all
Verbose level - 'quiet' means no logging at all and 'all' means to log everything. The levels are
given in order. If user specifies more then one verbose option the last option comes into effect.
The default level is 'warning'. Verbose level also can be set by --log-level=level.

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 set locate on a single block device. Note that all remaining
       LEDs, on all devices, will be turned off.

           ledctl locate=/dev/sda

       The following example illustrates how to set locate_off on a single block device.

           ledctl --listed-only locate_off=/dev/sda

       The following example illustrates how to set off on the given devices. It uses second  format  of  device
       list.

            ledctl --listed-only off={ /dev/sda /dev/sdb }

       The following example illustrates how to set locate and rebuild on different devices at the same time. It
       uses the second format of device list.

            ledctl --listed-only locate={ /dev/sdb } rebuild={ /sys/block/sdc }

       The  following  example  illustrates  how  to  locate on three block devices. It uses the first format of
       device list.

            ledctl --listed-only locate=/dev/sda,/dev/sdb,/dev/sdc

       The following example illustrates how to set locate and rebuild on different devices at the same time. It
       uses the first format of device list.

            ledctl --listed-only locate=/dev/sdb rebuild=/sys/block/sdc

       The following example illustrates how to set locate and rebuild on different devices at the same time. It
       uses the both formats of device list.

            ledctl --listed-only locate={ /dev/sdb } rebuild=/sys/block/sdc

LICENSE

       Copyright (c) 2009-2022 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.

AUTHOR

       This manual page was written by Artur Wojcik <artur.wojcik@intel.com>. It may be used by others.

LEDCTL Version 0.97                                 May 2023                                           ledctl(8)