<table cellspacing='0' cellpadding='0' border='0' ><tr><td valign='top' style='font: inherit;'><P>seems some people are not reading.</P>
<P>1)fire code here requires all lectrical wores to be in metal cinduit, so "oulling" wire is not possib;e.</P>
<P>2) I never have or ever implied I HAD A SAFETY or fire issue, I just am trying to anticipate needs in the future (near) as several overseas business also will be using my home as offsite storage servers.</P>
<P> </P>
<P>Can we try and het on topic? Thank you for the person who like me planned ahead but had the luxury of doing during construction.</P>
<P> </P>
<P>there will be a huge market as the USA lags far behind and we are beong leap-frogged by many emerging markets, just look at cell phones.</P>
<P> </P>
<P>Mike<BR><BR>--- On <B>Sun, 7/27/08, Nifty niftyompi Mitch <I><niftyompi@niftyegg.com></I></B> wrote:<BR></P>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(16,16,255) 2px solid">From: Nifty niftyompi Mitch <niftyompi@niftyegg.com><BR>Subject: Re: [Beowulf]Infrastruture planning for small HPC 40/100 gigabyet eyhernet or Infiniband?<BR>To: "Eugen Leitl" <eugen@leitl.org><BR>Cc: "Nifty niftyompi Mitch" <niftyompi@niftyegg.com>, Beowulf@beowulf.org<BR>Date: Sunday, July 27, 2008, 1:51 PM<BR><BR><PRE>On Sun, Jul 27, 2008 at 09:28:07PM +0200, Eugen Leitl wrote:
> On Sat, Jul 26, 2008 at 09:15:23PM -0700, Nifty niftyompi Mitch wrote:
>
> > Did I read this correctly?
> > Are you cutting holes in the walls of a home.....?
>
> Real homes have cable ducts -- I'm limited to drilling through walls.
> Unfortunately, due to lousy electric installation I'm stuck with
> severe ground loop issues (I catched that too late orelse
> I would have put in a heavy ground wire strung along the CAT 6/7).
> Galvanic separation would be a god-send -- but for the price
> tag, and unavailability of GBit polymer optical.
>
......
>
> CAT 6 is great, except if you see sparks when plugging in RJ-45s.
> Also, most systems tend to shutdown spontaneously overnight when
> on such dirty network.
>
> > Also all wires in the wall MUST be safety rated for such use.
>
OK if you have severe ground loop issues you must rethink
what you are doing! Ground loops generated by a bad power
install can have almost unlimited currents and present
a serious fire hazard. Get the problem fixed.
Contact a qualified electrician and find out what the root cause is.
AFAIK most network switches do provide MAC level isolation at the physical
layer so I am confused and _concerned_ about your comment about seeing sparks
at the RJ-46. Get the problem addressed promptly.
--
T o m M i t c h e l l
Looking for a place to hang my hat.
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