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MTBF for power supplies
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: firstname.lastname@example.org Network Computing Services, Inc. email@example.com 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.