The 1MB streaming data from disk should be closer to 4ms (250MB/s). Disk streaming rates (on 7200rpm drives) have not improved significantly, based upon the pub

The 1MB streaming data from disk should be closer to 4ms (250MB/s). Disk streaming rates (on 7200rpm drives) have not improved significantly, based upon the published “sustained transfer rate OD” metrics from the three drive manufacturers.