In SQL Server Best Practices Article,
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In addition to disk saturation, it is also possible to saturate the capacity of a Host Bus Adapter (HBA) before exhausting disk resources. Typical modern HBAs have a bandwidth of 2 Gb/s. This equates roughly into 200 MB/s. We have observed practical throughput in the range of 180–190 MB/s."
Can you please explain how is the 2 Gb/s bandwidth calculated to 200 MB/s. How can this be observed like it is mentioned above. can profiler/perfmon capture this?