Within the last year or so we have hit some issues with an MDS bug and our Qlogic Fibre switches which are modules of the IBM Blade Chassis. During a SAN migration it was noted that the disk paths kept failing kind of randomly. Prior to discovering the MDS bug, we had hard-coded all fcs adapters and Qlogic Fibre adapters to 2GB. Understandably, this was a potential cause. Logging into the fibre switches and setting the ports from 2GB to auto-negotiate will alleviate the issue with the random Path Failures.
Category: embedded_switch