Archive for February, 2011
Recently I bought a Synology DS211j NAS for storage. A pair of 2TB hard drives in RAID-1 make for roomy storage, and this NAS is rich on features for it’s price, and it only supports up to 2TB drives.
I ordered the NAS with 1 drive initially, then got the 2nd one shortly after. One minor thing I noticed fairly quickly is how the light from the drive 1 led would bleed into the drive 2 indicator. It made it look like the light was on when in fact it was off.
Despite it’s compact case (or maybe because of it) the DS211j is very easy to work on.
The case cover slides off for easy installation of the drives. Here you can see the NAS with the cover removed and one drive installed. The top drive slot is drive 1, the bottom is drive 2.
I had to see how the LED light output was being delivered to the front of the case, for this, I removed the front bezel from the case cover. It removes very easily using a #2 Philips screwdriver.
Next I placed the front bezel on the bottom to see where everything lined up. It was quickly evident where the light “leak” was occurring — the plastic divider that Synology was using between the LEDs simply wasn’t present between the drive 1 and drive 2 light channels.
After some thought I came up with a solution: Isolating the light channels using electrical tape.
I carefully put the electrical tape on the light channels and carefully cut to fit. The result:
I test fit the light guides over the LEDs.
And that’s it! After reassembly, the drive 2 LED was nicely blacked out. I did install my 2nd drive today and it looks great. I can now easily notice the drive LEDs blinking independently of each other.
It’s a well-known fact that Li-ion batteries have a shelf-life, and the OEM warranty on batteries is typically only a year. This is because not only do the cells degrade over time, but they also degrade over use. If you’re having trouble with your laptop battery, it’s often worth a minute or two to read the date code on it to see if it’s premature failure or old age. You can read more about Li-ion cell life here if you’re interested.
Every Dell part has a PPID sticker, and the Dell part number is part of that number. Along with the country of origin, the date of manufacture, and some other information. I’ll explain three of these fields. Here is a sample PPID sticker from a Dell battery:
You see three fields marked in the photo:
Country of origin: The first field (blue field) in the photo indicates the part’s 2-letter country of origin. In this case, Korea.
Part number: The second field (green field) in the photo has the Dell part number. In this case, UD265 (the leading zero is omitted if present). Knowing the part number makes it easier to order a replacement battery. :)
Date Code: The fourth field (red field) in the photo shows the parts date code in three digits:
The first [hex] digit indicates the year of manufacture. 1-9 for 2001-2009 respectively, 0 for 2010, A for 2011, B for 2012, C for 2013, D for 2014, E for 2015, F for 2016, etc. (Note: See Chris’ comment below.)
The second [hex] digit indicates the month of manufacture. 1-9 for January through September, respectively, and A-C for October through December.
The third [hex] digit indicates the day of manufacture. 1-9 for day 1 through 9 respectively, and A-V for 10-31.
This battery was made January 5th 2008.
So you’ve noticed the Network-Manager applet is missing from your notification area in Ubuntu and you can’t connect to your wifi or cellular network. Now what?
Here’s a few tips to get it back, based on Ubuntu 10.10:
1) Make sure Network-Manager applet is installed
Open Applications > Ubuntu Software Center
Type ‘network’ in the search box and hit enter.
Locate ‘Network Manager’ in the application list and make sure it has a green check mark next to it.
2) Make sure Network-Manager-Applet is set to run on start-up
Open System > Preferences > Startup Applications and make sure the box next to Network Manager is checked.
The next two tips are slightly modified tips provided from UbuntuGeek:
3) Make sure Network-Manager is managing your connections
Open the terminal and type:
gksu gedit /etc/NetworkManager/nm-system-settings.conf
change the “
managed=false” to “
managed=true” and then save it.
then in the terminal type:
and then reboot.
4) Re-add the notification area to your bar:
right click panel>add to panel>Notification Area
Open a terminal and type:
gksu gedit /etc/network/interfaces
then check that the file has only this 2 lines:
auto lo iface lo inet loopback
Delete all the others then reboot.
6) You may also want to try restoring the panels to default.