[19701] in North American Network Operators' Group
MTBF for power supplies
daemon@ATHENA.MIT.EDU (Joseph Thomas)
Tue Sep 22 14:24:25 1998
From: Joseph Thomas <jpt@networkcs.com>
To: nanog@merit.edu
Date: Tue, 22 Sep 1998 10:28:34 -0500 (CDT)
Hope this isn't too far off topic...
We're looking to beef up some of the equipment in our data
center's core backbone and one of the topics we're looking at is
redundant power supplies (specifically for Cisco 7000/7500 chasis's).
Cisco claims that the "observed" (vs. design - which I don't know) MTBF
is 2,000,000 hours for these supplies. Without much to back this up,
this number seems awfully high. Does anyone have any pointers to MTBF
numbers for network equipment (not necessarily Cisco related) and/or
any of their own experiences to relate? We have had one power supply
fail already (I don't know the MTBF but certainly an order or two less
than the number Cisco gave) and at that time, we pulled a supply from
another box. At the moment, we don't have enough of whatever (spare ports,
extra supplies, etc.) to do that anymore.
Any info appreciated. Thanks.
--
Joseph Thomas E/Mail: jpt@networkcs.com
Network Computing Services, Inc. jpt@magic.net
1200 Washington Ave So. Tel: +1 612 337 3558
Minneapolis, MN 55415-1227 FAX: +1 612 337 3400
An elephant is a mouse with an operating system.
