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31  General Category / General Discussion / Re: Power comsuption on: March 12, 2010, 03:58:50 PM
my plug shows 9watts per hour on my reader.
Since "watts" is a rate of usage of energy there is not such concept as "9watts per hour".
9 watts is 9 joules/s.  So 32.4kJ/hr.

9 watt-hours! Or 0.009 kilowatt-hours!
32  Linux Stuff / Kernel / Re: 2.6.33 new release on: March 09, 2010, 06:14:30 PM
And if you want even more current bleeding edge updates, there is the "git" patches from kernel.org:

linux-2.6.33-git15

http://kernel.org/
33  Hardware and U-Boot firmware / U-Boot stuff / The one second boot on: February 26, 2010, 10:56:48 PM
I like the work on making boots faster.

http://linux.slashdot.org/story/10/02/27/0110215/The-1-Second-Linux-Boot
34  Linux Stuff / General Linux questions / Re: FREE Webserver to access files??? on: February 23, 2010, 04:33:00 PM
I believe you are looking for a content management system...

almanah - application to ease management of a personal diary
diogenes - web content management system
libroxen-ecms - Simple content management module for the Roxen Challenger web server
med-cms - Debian Med content management systems
textpattern - flexible and easy-to-use content management system
typo3 - Powerful content management framework (Meta package)
webgui - Content management platform to maintain complex web sites
xfce4-cddrive-plugin - CD-Rom drive management plugin for the Xfce4 panel
zope-cmfbibliographyat - A Bibliography management product for Zope/CMF/Plone
zope-plone3 - content management system based on zope and cmf
zope-zms - Content management for science, technology and medicine
drupal6 - a fully-featured content management framework
35  General Category / General Discussion / Re: Can you make drives spin / power down on: February 22, 2010, 05:14:33 PM
Look into the hdparm utility.  It allows control of the hard drive's lower level functions.
36  Hardware and U-Boot firmware / Hardware / Re: Possibility of adding a shutdown battery on: February 13, 2010, 06:43:42 PM
Unfortunately I'm no hardware expert, so here's my question.
Can this be hacked onto the existing board? If not, any chance of seeing this added in the future?

A tiny, cheap 9 volt NiMH battery into a simple 3 pin 7805 regulator's output right onto the sheeva's power supply ought to do the trick.  Have some resistor or something trickle charge the battery and it should be good to go.
37  Linux Stuff / General Linux questions / Re: Newbie Linux Questions on: February 13, 2010, 04:26:07 PM
"screen" is a nice way to log into a shell, detatch it, reattatch later, or connect to the same window multiple times from multiple locations.  Logging out won't kill the screens.
38  General Category / General Discussion / Re: UPS for your plug. on: February 10, 2010, 09:19:50 PM
>I have one of those cheap UPS supplies and have a automotive battery in a battery box next to it.  It will last for days...

Can you explain this setup a little more fully?


Its where I pull the 12 volt battery out of the UPS unit and extend the wires to a bigger battery.  7ah replaced with 70ah.  That's about it!
39  General Category / General Discussion / Re: UPS for your plug. on: February 10, 2010, 03:46:09 PM
I have one of those cheap UPS supplies and have a automotive battery in a battery box next to it.  It will last for days...

Unfortunately, APC supplies float the battery voltage high, which requires the water level to be watched every month.  I believe APC does this on purpose, because it causes a battery that should last 15 years to only last 3 years.  Be careful with this setup, since the battery may be at line voltage and can shock or become a fire hazard.  That's why I keep it in a clean battery case.
40  General Category / General Discussion / Re: pdflush and syslogd 100% CPU usage on: January 26, 2010, 06:58:34 PM
What kernel version are you using?  I remember reading a lot of diffs between versions over storage on SD devices, on crude things like spinlocks and such.  It may be a bug that has been patched already.
41  General Category / General Discussion / Re: New plug computer 3.0 on: January 11, 2010, 05:20:04 PM
Wish it has a SATA port, FP for image processing, and some IO pins for SPI devices to play with...  I can dream...
42  Hardware and U-Boot firmware / U-Boot stuff / Re: How to protect plug from (unauthenticated) U-Boot access? on: January 08, 2010, 08:51:34 PM
Anyone with physical access to just about any device can use JTAG to install a new bootloader or manipulate the chips at will.
43  General Category / General Discussion / Re: pdflush and syslogd 100% CPU usage on: January 04, 2010, 04:53:31 PM
Try copying a large file and see if the load average gets unreasonable.
44  General Category / General Discussion / Re: pdflush and syslogd 100% CPU usage on: January 02, 2010, 04:55:27 PM
You can always kill syslogd.  Might be something that keeps logging in a loop.

killall -9 syslogd
45  General Category / General Discussion / Re: What packages you running? (Debian/Ubuntu users) on: January 01, 2010, 05:40:14 PM
running 513 packages after 111 days of uptime:

http://www.dattaway.net/images/InstalledPackages.txt
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