Archaio is an application used for generating test files which is used to test the capacity of a USB drive. Archaio will generate .aio file which is essentially a text file containing millions of 1. And the file generated are NOT dummy file since it actually has data in it.

The integer 1 occupy 1 byte in disk space, Archaio will write millions of 1 into a text file using a loop, the loop will breaks once the threshold attained. to achieve certain file size, we can manually set the threshold. In one loop Archaio will write exactly 1,000 bytes (1kb), we can set how many time Archaio will loop, say we want 10MB file which is 10,240,000 bytes (10 million), so we set a limit to the loop so it will only loops 10240 times and not 1024000 because Archaio will write 1,000 bytes per loop not 1 byte per loop. the code below will make it clearer:

The test was performed on a rig with:

• Intel Core i5 3470
• 8GB HyperX DDR3
• SSD Gamer Galax 120GB

Peak Maximum Speed: 251 Mb/s

NOTE: The performance will vary depending on the hardware you are running on. It can be also limited by the USB drive's bandwidth or its maximum Transfer Speed.