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I want to build a dedicated home file server that will also be used for streaming numerous video files. Does the SATA bandwidth matter if I will be using 1tb 7200rpm drives? Also, would I be able to downgrade the drive in any way without noticeable performance hits (disk speed)?

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Does the SATA bandwidth matter if I will be using 1 TB 7200 RPM drives?

The SATA bandwidth does not matter.

Even relative old SATA-II (3.0 gigabit/sec) is able to push 270 MB/sec.
That is a lot faster than your disk can supply.

The only exceptions to this are:

  1. If you use an SSD.
  2. If you use port multipliers to add multiple drives to a single SATA channel.


Also, would I be able to downgrade the drive in any way without noticeable performance hits

Streaming video files does not require a high RPM disk since the data is usually read sequentially. There is no advantage in using 7200 RPM drives for this. A 5400 RPM drive will work just fine, and might use less power and generate less heat.

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