heh, heh. Many years back I started a complicated scp process between several remote machines from my home office. I went and reloaded the coffee cup and then proceeded to stub my toe on the UPS power switch on the way back to happy geek remote control nirvana. In the microseconds it took for all the power to drain from all the devices, main linux box, monitor, ISDN modem, and for the depth of horror I had just created for myself to sink in, I could see the need for a protective cover over the power switch much like the springloaded box that protects the EPO switch in a data canter.<br>
<br><div class="gmail_quote">On Tue, Mar 22, 2011 at 11:00 AM, Ron Frazier <span dir="ltr"><<a href="mailto:atllinuxenthinfo@c3energy.com">atllinuxenthinfo@c3energy.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div text="#000000" bgcolor="#ffffff">
Been there, done that, except for the 5 years part. I have my desktop
PC attached to a 750 VA UPS, which says 15 minutes run time on the
box. Well, AT THIS LOAD level, the run time on that battery is 3
minutes, which I didn't know because I had fallen for the market speak
on the box. I happily pulled the plug, then nearly fainted as the PC
abruptly lost power after 3 - 4 minutes.<br>
<br>
My favorite backup is a cloned hard drive, which I can swap around in
two minutes. Didn't know that, didn't have that at the time. I did
have an image backup, but it was about a month old. I had to restore
Windows AND Linux (dual boot), and then recover data from an online
backup and resetup everything within the last month. So, my simple
happy UPS test turned into a long grumpy sad 2 day system building
exercise. NOT FUN!<br>
<br>
I learned a valuable and painful lesson. That is that you have to
customize the UPS settings to the situation. If I let the computer
drain this particular battery to 10%, or even 1%, which I think Gnome
defaults to, it would literally have only 5 - 10 seconds to shut down.
This is not enough time, even for Linux. I set my Windows UPS controls
on that machine to warn me at battery level of 85%, which is about 36
seconds into the power failure. Then, I set it to shut down at 70%
battery level, which is about 1.1 minutes into the power failure. At
least, this way, it will have about 2.5 minutes to complete the
shutdown, and it stands a fighting chance.<br>
<br>
I still haven't figured out to control the shutdown settings in the
Gnome power manager. I don't think you can.<br>
<br>
Sincerely,<br>
<br>
Ron<br>
<br>
<br>
<br>
On 03/22/2011 10:00 AM, Jim Kinney wrote:
<blockquote type="cite">"hard" is when you have to do the first test of the
recovery system: make backup, pull the plug, restore from bare iron 5
years worth of critical data.<br>
<br>
<div class="gmail_quote">On Tue, Mar 22, 2011 at 9:31 AM, Derek
Atkins <span dir="ltr"><<a href="mailto:warlord@mit.edu" target="_blank">warlord@mit.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>"Lightner, Jeff" <<a href="mailto:jlightner@water.com" target="_blank">jlightner@water.com</a>> writes:<br>
<br>
> What is scary is there are still people today who don't see the
need for<br>
> regular backups until something goes belly up on them.<br>
<br>
</div>
coming up with a backup system is *hard*<br>
implementing it is even harder.<br>
<br>
-derek<br>
<font color="#888888">--<br>
Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory<br>
Member, MIT Student Information Processing Board (SIPB)<br>
URL: <a href="http://web.mit.edu/warlord/" target="_blank">http://web.mit.edu/warlord/</a> PP-ASEL-IA N1NWH<br>
<a href="mailto:warlord@MIT.EDU" target="_blank">warlord@MIT.EDU</a>
PGP key available</font><br>
</blockquote>
</div>
<br>
</blockquote>
<br>
<pre cols="72">--
(PS - If you email me and don't get a quick response, you might want to
call on the phone. I get about 300 emails per day from alternate energy
mailing lists and such. I don't always see new messages very quickly.)
Ron Frazier
<a href="tel:770-205-9422" target="_blank">770-205-9422</a> (O) Leave a message.
linuxdude AT <a href="http://c3energy.com" target="_blank">c3energy.com</a>
</pre>
</div>
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