Checkmk Werk 8901: Fixed calculation of latency for netapp check

ID: 8901 Title: Fixed calculation of latency for netapp check Component: Checks & agents Level: 1 Class: Bug fix Version: 1.7.0i1 Average latency, average read latency, and average write latency are now calculated as a function of total_ops instead of the time. This complies with the formula from NetApp's Performance Management Design Guide.