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Merge pull request #3 from willglynn/expand_readme

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Add more information to README
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Andrew Sorensen
2016-05-24 18:23:24 -07:00
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@@ -4,37 +4,54 @@ This is currently in prototype status.
## Requirements
apt-get install sg3-utils
Requires Python and the `sg_ses` utility, provided by [the `sg3_utils` package](http://sg.danny.cz/sg/sg3_utils.html).
Debian-based systems might use:
# apt-get install sg3-utils
On RHEL/CentOS systems:
# yum install sg3_utils
FreeNAS 9.10 includes `sg_ses` as part of the standard image.
## Usage
find your scsi controller (one of the /dev/sgX devices, perhaps using lsscsi)
Find the SCSI Enclosure Services device corresponding to your SA120. On Linux, this is likely one of the `/dev/sg*` devices. (Try `lsscsi`?) On FreeBSD, this is likely `/dev/ses*` instead.
change /dev/sgX in fanspeed.py if needed.
You can use `sg_ses` to identify SES devices, e.g.:
````
# python fan.py 2
Fan 0 speed: 0
Fan 1 speed: 947
Fan 2 speed: 932
Fan 3 speed: 812
Fan 4 speed: 932
Fan 5 speed: 947
Reading current configuration...
Setting fan 0 to 2
Setting fan 1 to 2
Setting fan 2 to 2
Setting fan 3 to 2
Setting fan 4 to 2
Setting fan 5 to 2
LENOVO ThinkServerSA120 1007
Sending Enclosure Control [0x2] page, with page length=296 bytes
# sg_ses /dev/ses0
LSI CORP SAS2X28 0717
…
# sg_ses /dev/ses1
LENOVO ThinkServerSA120 1007
…
Fan 0 speed: 0
Fan 1 speed: 945
Fan 2 speed: 932
Fan 3 speed: 812
Fan 4 speed: 926
Fan 5 speed: 945
Once you've found your SA120, use `fancontrol.py` to set the fan speed:
# python fancontrol.py /dev/sg0 2
Fan 0 speed: 0
Fan 1 speed: 947
Fan 2 speed: 932
Fan 3 speed: 812
Fan 4 speed: 932
Fan 5 speed: 947
Reading current configuration...
Setting fan 0 to 2
Setting fan 1 to 2
Setting fan 2 to 2
Setting fan 3 to 2
Setting fan 4 to 2
Setting fan 5 to 2
LENOVO ThinkServerSA120 1007
Sending Enclosure Control [0x2] page, with page length=296 bytes
Fan 0 speed: 0
Fan 1 speed: 945
Fan 2 speed: 932
Fan 3 speed: 812
Fan 4 speed: 926
Fan 5 speed: 945
````