Patent ID: 7565226
Filing Date: 2009-07-21
Classification: G01M

Abstract:
1. A method to determine one or more ranges of fan speeds for one or more cooling fans in a chassis with one or more systems to avoid vibrational resonance in the chassis caused by the one or more cooling fans comprising: determining a range of operable fan speeds for the one or more cooling fans that meets a cooling goal of the one or more systems in the chassis, wherein the one or more cooling fans are used to cool the chassis, and the one or more systems; scanning fan speeds for the one or more cooling fans over the determined range of operable fan speeds; collecting and analyzing read or write rates on a hard disk drive in the one or more systems over the determined range of operable fan speeds; and determining one or more ranges of usable fan speeds that avoid vibrational resonance in the chassis caused by the one or more cooling fans, based on the collected and analyzed read or write rates, so that fan speeds that avoid vibrational resonance are selected, wherein the determining one or more ranges is performed by a controlling system.