Re: M20 DC Power Supply Fail

From: Adam Korab (adam@inebraska.com)
Date: Wed Jul 24 2002 - 13:46:57 EDT


On Wed, Jul 24, 2002 at 06:31:35AM -0700, Majdi S. Abbas wrote:
> On Wed, Jul 24, 2002 at 09:15:57AM -0400, Daniel Puka wrote:
> The fan hasn't failed, it's a monitoring issue. Unfortunately,
> the fix is a new power supply. We've swapped a large number of these
> of late.

Here's where I throw in the "me too" -- but the breakage isn't just limited to the
DC supplies, methinks. I'm replacing an AC supply this Friday because
of a fan failure, and it's not the first. The fan false alarm bug seems
to be DC only, or at least exponentially more prevalent.

What we've found is that 'show chassis hardware' is a good way to
determine if the power supply is really broken of it you just the
reporting problem. The latter means a replacement, but perhaps not as
urgently. If the output says the fan for the PS in alarm is ok and
spinning, you're golden. If not, well, good thing there are two
supplies. :)

> Incidentally, make sure you swap them inside a maintenance window
> because sometimes when you're doing it the power supply will freak, throw
> a high temperature alarm, and the router will shut itself off as a result.

Amen. Knock on wood, it's only happened to me once.

--Adam

-- 
Adam Korab	

The site www.ticketmaster.com is running Microsoft-IIS/5.0 on Linux [http://uptime.netcraft.com/up/graph/?mode_u=off&mode_w=on&site=www.ticketmaster.com]



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