What are the biggest factors for disk write speed?
I am doing some performance tests for the amount of time it takes to write X amount of files to a specified location. I will be comparing write speeds: 1) with a custom file system driver installed and loaded, and 2) with the file system driver not installed nor loaded.

I want to test this on various machines with various OS's. Also, I want to allow the test to be performed anytime and have results be used as a benchmark so I can compare new results for any new development of the file system driver.

What are the factors of write speed when writing a bunch of files to a hard disk?
What are the biggest factors for disk write speed?
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I am doing some performance tests for the amount of time it takes to write X amount of files to a specified location. I will be comparing write speeds: 1) with a custom file system driver installed and loaded, and 2) with the file system driver not installed nor loaded.

I want to test this on various machines with various OS's. Also, I want to allow the test to be performed anytime and have results be used as a benchmark so I can compare new results for any new development of the file system driver.

What are the factors of write speed when writing a bunch of files to a hard disk?