Date: Mon, 13 Mar 2006 13:36:36 +0000 From: Brian Candler <B.Candler@pobox.com> To: Nikolas Britton <nikolas.britton@gmail.com> Cc: freebsd-net@freebsd.org Subject: Re: floating a server room... how do you deal with ethernet connections? Message-ID: <20060313133635.GA51377@uk.tiscali.com> In-Reply-To: <ef10de9a0603130057v2b8fcd0cl6f9f73c8f2820645@mail.gmail.com> References: <ef10de9a0603130057v2b8fcd0cl6f9f73c8f2820645@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Mon, Mar 13, 2006 at 02:57:35AM -0600, Nikolas Britton wrote: > I'm currently planning renovations for the power mains supplying are > server room. One of the ideas I have is to float the entire room using > a isolation transformer. The only problem to this solution, that I can > think of, is that all of the equipment that's attached to the other > end of the Ethernet cabling won't be isolated, the NIC cards do have > 1:1 transformer coupling for the wire pairs but... In the event of > power surges, spikes, brownouts, and/or nearby lighting strikes I feel > that It's conceivable for there to be a large voltage differential on > the wires that could damage the equipment on ether end of the wire. > > Are there any easy (cheap) work arounds to this problem You could use fibre. Might not immediately qualify as "easy or cheap", but then again, if you've got local distribution switches in each floating rack, then all you need is fibre uplinks to the central switching infrastructure. But apart from that, I can't say how good an idea floating the room is. AFAIK, most mains inlet filters have some inductive and capacitive components to earth, so it may not float that far. Regards, Brian.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20060313133635.GA51377>