Many SATA to USB adapters list a maximum supported size such as 4TB, 10TB, etc. Why?

For example, this adapter lists a 4TB max whereas this other popular adapter lists 12TB as the max supported.

Here are possible reasons I've thought of:

  1. Higher capacity drives require more power (especially startup power to overcome the inertial mass of the platters) (why not list the power requirement instead?)
  2. Higher capacity drives require some address scheme which isn't supported by the adapter's firmware.

What is the most common reason?

Is an adapter rated for 4TB likely to work with an 8TB drive?

  • 1
    The limitation comes from the SATA controller used in those products. It has nothing to do with the power differences between larger drives (not an issue) nor a concern of the address schema used by the drive. – Ramhound Mar 5 at 19:06
  • What is it about the SATA controller in these converters that limits them? Can you point me to a technical document so I can learn more? – Gordon Fogus Mar 6 at 15:14
  • Those product pages don’t specify which controllers so I wouldn’t be able to point to the specifications of the controllers themselves. How I know what I said to be true is just based on hundreds of hours of research – Ramhound Mar 6 at 15:39

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