Today I rediscovered screenlets for Ubuntu. If you don’t know what screenlets are, click on the thumbnail on the right.
On my old laptop I tried using them before, but the poor thing couldn’t handle it.
Now with my new laptop I decided to give it another go.
Using compiz-fusion you can put these screenlets on a special ‘widget layer’, which you can summon by pressing a keyboard key. Whenever you need some information or need to make a small note, you press that keyboard key and the widget layer is displayed. Pressing the same key again and the widgets disappear.
There’s a nice screenlet that displays some sensor information, CPU and HDD temperatures. However, my laptop has another sensor on the graphics card that shows the GPU temperature. I just had to have this added to the screenlet.
I made a modified version of the Temperature2 script to generate a screenlet for nvidia GPU temperature. You’ll need the proprietary nvidia drivers installed and access to the ‘nvidia-settings’ utility. Download the file and place it in the ~/.screenlets/Temperature2/ directory, overwriting the old file.
Update: My modifications are now included into version 0.4 of Temperature2. You can get it at screenlets.org
I’ve been running my Areca RAID array for a few months now and I’m very pleased with it. The only thing that was bothering me was the lack of MRTG graphs for the attached disks.
The disk temperature is an important thing to monitor, because as Google pointed out, a high disk temperature has a significant effect on drive failure.
Areca has made some excellent tools available to monitor your array and attached disks. For example, Areca’s web interface can show you all the disk temperatures.
In Areca’s web interface you have total control over your RAID array. You can add/remove disks, create new arrays and do a check on existing arrays.
But it’s annoying to have to log in to this web interface just to check the temperatures of the disks. Also, it doesn’t come with nice graphs and history information. It just shows the current temperatures.
Areca has also made a CLI utility. Using this utility you can do the same things as in the web interface. I’ve used the CLI utility to generate the data needed by MRTG. MRTG can only handle 2 datasources in one graph. Having 5 disks total (1 bootdisk, 4 RAID member disks), I would need 3 graphs to monitor the disks. So I decided to create a little BASH script that would take the temperature of the bootdisk, and the average temperature of the 4 RAID disks and feed this to MRTG.