With a 3s average response time and presumably replication across multiple disks, you've plenty of scope to schedule requests in a way that they won't affect pe

With a 3s average response time and presumably replication across multiple disks, you've plenty of scope to schedule requests in a way that they won't affect performance. In 3s on one disk you can do roughly 5k seeks and read up to 300MB. They only need to do 1 seek and read 4MB.