08-06-2010 06:40 AM
The SAN I administer is made up solely of SW4100’s. Yesterday I upgraded all switches from FOS 5.3.1b to v6.0.0a. My understanding with Hot Code Activation was no disruption to service – no loss of light, no dropped frames when the switch is reset as the ASICs remain online.
Only two servers on the SAN reported an issue. Both servers are the same platform as they provide a cluster (RAC) service. When the firmwaredownload completed and the switch reset, the hosts lost connectivity to their disk devices. Host specific detail:
The hosts connected to the SAN include Solaris, AIX, Linux (different kernels) and Windows. No other host connected to the SAN reported an issue and service was maintained as I would have expected. As far as I am aware, only the aforementioned two Linux hosts lost disk devices.
I can not find anything online that would point to what may have caused the issue. Any ideas??