ledmon(8)           Intel(R) Enclosure LED Monitor Service           ledmon(8)

       ledmon - Intel(R) LED monitor service for storage enclosures.

       ledmon [OPTIONS]

       The ledmon application is a daemon process used to monitor a state of
       software RAID devices (md only) or a state of block devices. The state
       is visualizing on LEDs associated to each slot in an enclosure or a
       drive bay. There are two types of system: 2-LEDs system (Activity LED,
       Status LED) and 3-LEDs system (Activity LED, Locate LED, Fail LED).
       This application has the highest priority when accessing the LEDs.

       The ledmon 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 processor will accept
       IBPI pattern but it will blink LEDs not according to SFF-8489
       specification or it has limited number of patterns supported.

       LED management (AHCI) and SAF-TE protocols are not supported.

       There's no method provided to specify which RAID volume should be
       monitored and which not. The ledmon application monitors all RAID
       devices and visualizes their state.

       The ledmon 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 SAS/SCSI controllers). However storage
       controllers of other vendors have not been tested.

       The ledmon application is part of Intel(R) Enclosure LED Utilities.
       Only single instance of the application is allowed.

       -c or --config=path
               Sets a path to local configuration file. If this option is
               specified the global configuration file and user configuration
               file has no effect.

       -l or --log=path
               Sets a path to local log file. If this option is specified the
               global log file /var/log/ledmon.log is not used.

       -t or --interval=seconds
               Sets time interval between scans of sysfs. The value is given
               in seconds.  The minimum is 5 seconds the maximum is not

       --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.

       -h or --help
               Prints this text out and exits.

       -v or --version
               Displays version of ledmon and information about the license
               and exits.

               Global log file, used by ledmon application. To force logging
               to user defined file use -l option switch.

               Global configuration file, shared between ledmon and all ledctl
               application instances. Local configuration file can be used by
               running ledmon with -c switch.

       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 build-in
       help for details on the License and the lack of warranty.

       The ledmon application does not recognize PFA state (Predicted Failure
       Analysis), hence the PFA pattern from SFF-8489 specification is not

       ledctl(8), ledmon.conf(5)

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

LEDMON Version 0.90              February 2018                       ledmon(8)