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Due to an intermittent physical failure of a single SAN switch SFP resulted in significant system impact affecting this media company core business application, users and their customers for an extended period of time. As the issue was not a hard failure, the disk paths would establish and everything running okay, until the next failure which may only last a few seconds but caused extreme response times to the users and their customers. It took some time to identify what was happening and at one stage a couple of days passed and we thought the issues had been resolved, this was not the case. When a failure would occur and the system disk paths would recover, there was no method to reliably and cleanly change the priority of the multi paths, it keep coming back to the unreliable path each time.
We have review RFE cases 136197 & 143638 and it would be beneficial to have some method, manually, automatically or a combination to change the path status in the event a path is deemed unstable. How that is determined and how quickly the system may change a paths status may require an automated phase and alerts, and then confirmation to remain with that status until the root cause has been resolved. I would also suggest having a one page summary status screen outside of SST to quickly review the status of paths and manage priority or changes.
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