[Gllug] Was there Power Outage at Telehouse?

[Alain Williams]

On Thu, Aug 17, 2006 at 08:42:28PM +0100, Matthew Thompson wrote:
> On 17 Aug 2006, at 16:18, - Tethys wrote:
> 
> >On 8/17/06, Matthew Thompson <matt.thompson at actuality.co.uk> wrote:
> >
> >>It appears it was the power distribution unit lost power - this is  
> >>the
> >>last section before your/your ISP's servers so would be difficult to
> >>build in much more redundancy there.
> >
> >Not so. Redundant PDUs per room, feeds from both PDUs to each cabinet,
> >and multiple power supplies per server, taking feeds from both PDUs.
> >Simple, really.
> 
> Can you safely do this across phases?

Machine with 2 PSU, each is fed from a different PDU. The output of the
PSUs is DC -- ie not related to the phase that it came from (so to speak).

-- 
Alain Williams
Parliament Hill Computers Ltd.
Linux Consultant - Mail systems, Web sites, Networking, Programmer, IT Lecturer.
+44 (0) 787 668 0256  http://www.phcomp.co.uk/

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