RONALD EWELL CHAMBERS
Pilots at Frey Ave, Fort Collins, CO
License number
Colorado A5045567
Issued Date
Jul 2015
Expiration Date
Jul 2017
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
129 Frey Ave, Fort Collins, CO 80521
Professional information
Detecting Bogus Ios In A Multipathing Driver
US Patent:
8621121, Dec 31, 2013
Filed:
Sep 26, 2012
Appl. No.:
13/627594
Inventors:
Vinay G. Rao - Bangalore, IN
Ronald Chambers - Fort Collins CO, US
Ronald Chambers - Fort Collins CO, US
Assignee:
EMC Corporation - Hopkinton MA
International Classification:
G06F 13/00, G06F 3/00
US Classification:
710 38, 710 2, 710 5, 710 8, 710 11, 710 32
Abstract:
An improved technique for processing IO requests has been described that distinguishes bogus IOs from genuine IO request failures by accessing a hardware configuration record that associates available paths with hardware components at different hardware layers traversed by the paths. When an IO request fails down a first path, a second path is selected for retrying the IO request by accessing the hardware configuration record and identifying a path that the record indicates traverses hardware components that are different from those traversed by the first path at multiple hardware layers. The chance that an IO request will fail due to faulty hardware over both the first path and the second path is thus low, such that IO failures down both the first path and the second path provide a clear indication that the IO request is bogus.