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Minor README fix

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desbma
2014-09-29 16:04:10 +02:00
parent 52743be71d
commit 7879c0aca0
1 changed files with 6 additions and 7 deletions
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README.md
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@@ -10,7 +10,7 @@ This has 3 benefits:
Because fans will slow down or stop when not needed:
* it minimizes noise generated by the fans
* it also minimizes power consumption at the same time
* it also minimizes power consumption at the same time
## When is this useful?
@@ -39,7 +39,7 @@ The ideal use case is for a NAS with several hard drives, a low power CPU (ie. A
* A motherboard which:
* exposes to the OS a PWM to control fan speed
* exposes to the OS a sensor to query fan speed
Most motherboards and SATA drives fit these requirements.
@@ -48,7 +48,7 @@ Most motherboards and SATA drives fit these requirements.
HDD Fan control needs Python >= 3.4. It probably works with Python 3.3 with minimum efforts, or even previous 3.x versions, but I have not tested it.
1. Clone this repository
2. If you don't have it, [install pip](http://www.pip-installer.org/en/latest/installing.html) for Python3 (may not be needed with Python >= 3.4).
2. If you don't have it, [install pip](http://www.pip-installer.org/en/latest/installing.html) for Python3 (may not be needed with Python >= 3.4).
On Ubuntu and other Debian derivatives, you can install with `sudo apt-get install python3-pip`
3. Install Python dependencies: `pip3 install -r requirements.txt`
4. Install [hdparm](http://sourceforge.net/projects/hdparm/) and [hddtemp](http://www.guzu.net/linux/hddtemp.php).
@@ -61,18 +61,16 @@ To query fan caracteristic, you may also need pwmconfig. On Ubuntu and other Deb
### A word of caution
The default parameters will run fans at 100% speed at temperatures > 50°C, and run then a 20% speed if < 30°C, which corresponds to the usual recommended drive operating temperature. If you are sure that there are no other components in your system that generate significant heat, if you have other fans to cool down youy system, or if you have a case optimized for passive cooling, you can set minimum speed to 0%, which will stop the fans if temperature is below the minimum threshold.
The default parameters will run fans at 100% speed at temperatures > 50°C, and run them a 20% speed if < 30°C, which corresponds to the usual recommended drive operating temperature. If you are sure that there are no other components in your system that generate significant heat, if you have other fans to cool down youy system, or if you have a case optimized for passive cooling, you can set minimum speed to 0%, which will stop the fans if temperature is below the minimum threshold.
**Be aware that a misconfiguration of this tool can lead to a failure to cool down your system properly which can damage components or reduce their lifetime.**
Before using HDD Fan control unmonitored for long period of time, I recommend keeping a minimum fan speed for security, and checking that the temperature of your system stays in reasonable range as expected.
### Fan configuration
To get the value for the `--pwm`, `--pwm-start-value` and `--pwm-stop-value` parameters, use the [pwmconfig tool](http://www.lm-sensors.org/wiki/man/pwmconfig).
### Drive auto spin down
SATA drives can be configured to automatically spin down after a certain period of inactivity, which saves power. If your drives are configured to do so, you may notice that they do not spin down when HDD Fan control is running.
@@ -84,7 +82,7 @@ To fix that, you can either:
**Keep in mind that spinning down and up a drive repeatedly wears a it prematurly, so unless you are in a power constrained environement (ie. laptop), do not set the spin down time too low.**
Reading temperature while a drive is in low power state will make it spin up, so HDD Fan control will stop querying temperature in that case, and wait for the drive (which will be cooling down in low power state anyway) to spin up.
Reading temperature while a drive is in low power state will make it spin up, so HDD Fan control will stop querying temperature in that case, and wait for the drive (which will be cooling down in low power state anyway) to spin up.
Some Hitachi (now HGST) drives support a special way of querying temperature that does not spin up drives, which HDD Fan control will detect and use, however it still prevents them from spinning down, so the above instructions still apply.
@@ -144,6 +142,7 @@ Some Hitachi (now HGST) drives support a special way of querying temperature tha
--pid-file PID_FILEPATH
Filepath for lock file when using deamon mode
## License
[GPLv3](https://www.gnu.org/licenses/gpl-3.0-standalone.html)