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Tip #031: What Determines Storage Speed?

Larry Jordan – https://LarryJordan.com

Storage performance is key to successful video editing.

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As you might expect, storage performance is dependent upon multiple factors – and how it connects is only a part. Storage speed, which is often called “bandwidth,” is determined by:

  • How it is connected to your computer, including the protocol used for communication
  • The number of drives or devices it contains

For example, Thunderbolt 3 is very, very fast – up to 3,000 MB/second! But, if that device only has one spinning hard disk inside, the actual speed will be closer to 150 MB/second. Here are three typical examples:

  • A single spinning hard drive transfers data about 150 MB/sec.
  • A single PCIe SSD transfers data around 400 MB/sec
  • A single NVMe SSD transfers data around 2,500 MB/sec

Think of it this way: The Thunderbolt 3 protocol is a very, very large water pipe. The devices connected to it determine how much water flows inside that pipe.

You can have a very large pipe, but if you are only filling it with a garden hose, you won’t get a whole lot of water through of it.


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