1ledmon(8)           Intel(R) Enclosure LED Monitor Service           ledmon(8)
2
3
4

NAME

6       ledmon - Intel(R) LED monitor service for storage enclosures.
7

SYNOPSIS

9       ledmon [OPTIONS]
10

DESCRIPTION

12       The ledmon application is a daemon process used to monitor a state of
13       software RAID devices (md only) or a state of block devices. The state
14       is visualizing on LEDs associated to each slot in an enclosure or a
15       drive bay. There are two types of system: 2-LEDs system (Activity LED,
16       Status LED) and 3-LEDs system (Activity LED, Locate LED, Fail LED).
17       This application has the highest priority when accessing the LEDs.
18
19       The ledmon application uses SGPIO and SES-2 protocol to control LEDs.
20       The program implements IBPI patterns of SFF-8489 specification for
21       SGPIO. Please note some enclosures do not stick close to SFF-8489
22       specification. It might happen that enclosure processor will accept
23       IBPI pattern but it will blink LEDs not according to SFF-8489
24       specification or it has limited number of patterns supported.
25
26       LED management (AHCI) and SAF-TE protocols are not supported.
27
28       There's no method provided to specify which RAID volume should be
29       monitored and which not. The ledmon application monitors all RAID
30       devices and visualizes their state.
31
32       The ledmon application has been verified to work with Intel(R) storage
33       controllers (i.e. Intel(R) AHCI controller and Intel(R) SAS
34       controller).  The application might work with storage controllers of
35       other vendors (especially SAS/SCSI controllers). However storage
36       controllers of other vendors have not been tested.
37
38       The ledmon application is part of Intel(R) Enclosure LED Utilities.
39       Only single instance of the application is allowed.
40

OPTIONS

42       -c or --config=path
43               Sets a path to local configuration file. If this option is
44               specified the global configuration file and user configuration
45               file has no effect.
46
47       -l or --log=path
48               Sets a path to local log file. If this option is specified the
49               global log file /var/log/ledmon.log is not used.
50
51       -t or --interval=seconds
52               Sets time interval between scans of sysfs. The value is given
53               in seconds.  The minimum is 5 seconds the maximum is not
54               specified.
55
56       --quiet or --error or --warning or --info or --debug or --all
57               Verbose level - 'quiet' means no logging at all and 'all' means
58               to log everything. The levels are given in order. If user
59               specifies more then one verbose option the last option comes
60               into effect. The default level is 'warning'. Verbose level also
61               can be set by --log-level=level.
62
63       --foreground
64               Run process foreground instead of a daemon. This option is
65               useful in systemd service file. Another use case of this option
66               is debugging with elevated --log-level=level.
67
68       -h or --help
69               Prints this text out and exits.
70
71       -v or --version
72               Displays version of ledmon and information about the license
73               and exits.
74

FILES

76       /var/log/ledmon.log
77               Global log file, used by ledmon application. To force logging
78               to user defined file use -l option switch.
79
80       /etc/ledmon.conf
81               Global configuration file, shared between ledmon and all ledctl
82               application instances. Local configuration file can be used by
83               running ledmon with -c switch.
84

LICENSE

86       Copyright (c) 2009-2017 Intel Corporation.
87
88       This program is distributed under the terms of the GNU General Public
89       License as published by the Free Software Foundation. See the build-in
90       help for details on the License and the lack of warranty.
91

BUGS

93       The ledmon application does not recognize PFA state (Predicted Failure
94       Analysis), hence the PFA pattern from SFF-8489 specification is not
95       visualized.
96

SEE ALSO

98       ledctl(8), ledmon.conf(5)
99

AUTHOR

101       This manual page was written by Artur Wojcik <artur.wojcik@intel.com>.
102       It may be used by others.
103
104
105
106LEDMON Version 0.92               April 2019                         ledmon(8)
Impressum