These benchmarks provide a rough estimate of how USB devices perform on various hardware and software configurations.
|I see two possible bottlenecks when bechmarking read/write operations on a storage device: the CPU and the device itself.
* If you expected notable differences between the CPUs, you would conduct a series of benchmark with the same storage device but different CPUs. You would also make sure that the storage device used in this benchmark is NOT a bottle neck.
* If you expected notable differences between the storage devices, you would conduct a series of benchmarks with the same CPU, but different storage devices. Again, you would make sure, that the CPU is not the bottle neck!
* there is of course a third possible bottle neck: the USB controller (MAC+PHY) on the SoC and/or possibly the USB-to-SATA converter, in case you use a SATA hard disk.
I do not know, about notable differences in CPU, but there definitely are very slow flash storage devices purchasable out there with maximum read/write "speeds" of < 2MB/s and less!!!
^ ^^^ ^^^ Timing (MB/s) ^^ Sequential Output (KB/s) ^^ Sequential Input (KB/s) ^ Random ^
|Device||USB||Software Version||Drive||USB||Filesystem||Cached Reads||Buffered Disk Reads||Block||Rewrite||Block||Seeks/s|
|ARV4518PW||2.0||Barrier Breaker, r35905||Maxell, 4GB||2.0||ext4||57.97||12.86||3,776||2,918||16,518||17.1|
|VR-3025un||2.0||Barrier Breaker, r37514||Maxell, 4GB||2.0||ext4||87.66||12.82||2,743||2,654||19,213||16.9|
|VR-3025un SMP||2.0||Barrier Breaker, r37842||Maxell, 4GB||2.0||ext4||116.20||13.24||3,815||2,939||18,480||18.4|
|Wyse Winterm S10||2.0||Attitude Adjustment, r34668||Maxell, 4GB||2.0||ext4||134.98||13.72||3,861||3,167||18,472||17.6|
|TP-Link TL-WDR4300 v.1.1||2.0||Attitude Adjustment, r34185 (12.09-rc1)||Unknown Manufacturer,1) 2GB||2.0||ext4||82.57||9.85||272||599|
Kingston Technology Company Inc. DataTraveler 2.0 1GB/4GB Flash Drive / Patriot Xporter 4GB Flash Drive" in