<span style="font-family: Arial;"> I have a AC-DC-AC UPS. I an fairly sure it is not a power related problem. The switch is old and has already burned through one power supply. I think it just got too old and tired. I think it burned out the network card, too, possibly in its flailing.. I think it all relates to the switch. <br><br>-derek<br><br>Sent from my HTC smartphone<br><br><div id="htc_header" style="">----- Reply message -----<br>From: "Ted Creedon" <tcreedon@easystreet.net><br>To: "Derek Atkins" <warlord@mit.edu><br>Cc: <gnucash-announce@gnucash.org>, <gnucash-devel@gnucash.org>, <gnucash-user@gnucash.org><br>Subject: Unplanning network maintenance/outage<br>Date: Sun, Mar 17, 2013 11:56 AM<br><br></div></span><br>Do you need a UPS?<br><br>Sounds like a power related problem<br><br>tedc<br><br><div class="gmail_quote">On Sun, Mar 17, 2013 at 5:18 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="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Good morning, GnuCashers,<br>
<br>
Some (many?) of you may have noticed the outage of '<a href="http://code.gnucash.org" target="_blank">code.gnucash.org</a>'<br>
starting with a lot of packet loss on Thursday and escalating into a<br>
complete outage by Friday. This took out our Subversion, Wiki, Email<br>
List, everything server. Well, as of 2:15pm US/EDT on Saturday<br>
(yesterday) everything should be back to normal and operational. If you<br>
don't want to hear the gory details of what happened feel free to stop<br>
reading now.<br>
<br>
The issue was multiple simultaneous failures of multiple pieces of<br>
equipment. What I thought was a power outage turned out be caused by a<br>
failure in my main network switch. It started dropping ports, or<br>
causing ports to fail partially (dropping packets). This was also the<br>
main cause of the packet loss, too. However I didn't discover this<br>
until later.<br>
<br>
My main DHCP server was off the net; I swapped ethernet cables and it<br>
appeared to fix the problem.<br>
<br>
My main database server, however, lost its main network controller so I<br>
had to install a new one (I have a few on hand, so it was a relatively<br>
painless operation -- I just had to remember the magic voodoo to get the<br>
system to call the new card 'eth0', but that was also only a few<br>
minutes).<br>
<br>
It was only after I got this working that I realized that it was the<br>
switch that had failed -- many of the ports connected to actual hosts<br>
had a 'dead link'. I also noticed that my main DHCP server was<br>
bouncing. It would come on the net, stay for a bit, and then go dark.<br>
Luckily I also had a few extra (smaller) switches lying around so I<br>
linked a few of them together and moved all the non-working ports over.<br>
This also fixed the bouncing DHCP server.<br>
<br>
Last, but not least, the VM Server Host's network was wedged, requiring<br>
a complete reboot to reset. This also required resetting all the VMs,<br>
some of which required a bit of hand-holding to come back (and many of<br>
which required a virtual disk fsck as well, taking even more time). The<br>
last of the systems returned to service shortly after 2pm.<br>
<br>
I do plan to acquire a new switch to replace the failing one, but what I<br>
have now is working so I'll watch it closely for now.<br>
<br>
Thanks,<br>
<br>
-derek<br>
<span class="HOEnZb"><font color="#888888"><br>
--<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">warlord@MIT.EDU</a> PGP key available<br>
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