On 07/07/18 01:28, Buterbaugh, Kevin L wrote: [SNIP]
So, to try to rule out everything but the storage array we replaced the FC cables going from the SAN switches to the array, plugging the new cables into different ports on the SAN switches. Then we repeated the dd tests from a different NSD server, which both eliminated the NSD server and its’ FC cables as a potential cause … and saw results virtually identical to the previous test. Therefore, we feel pretty confident that it is the storage array and have let the vendor know all of this.
I was not thinking of doing anything quite as drastic as replacing stuff, more look into the logs on the switches in the FC network and examine them for packet errors. The above testing didn't eliminate bad optics in the storage array itself for example, though it does appear to be the storage arrays themselves. Sounds like they could do with a power cycle...
JAB. -- Jonathan A. Buzzard Tel: +44141-5483420 HPC System Administrator, ARCHIE-WeSt. University of Strathclyde, John Anderson Building, Glasgow. G4 0NG _______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at spectrumscale.org http://gpfsug.org/mailman/listinfo/gpfsug-discuss
