Provided by: ledmon_0.32-1_i386
ledmon - Intel(R) LED monitor service for storage enclosures.
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). The application might work
with storage controllers of other vendors (especially SAS/SCSI
controllers). However storage controllers of other vendors have not
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
-h or --help
Prints this text out and exits.
-v or --version
Displays version of ledmon and information about the license
Global log file, used by ledmon application. To force logging
to user defined file use -l option switch.
User configuration file, shared between ledmon and all ledctl
Global configuration file, shared between ledmon and all ledctl
Copyright (c) 2009 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
This manual page was written by Artur Wojcik <email@example.com>.
It may be used by others.