The fastest way to copy to (not from) high speed flash storage.

Overview

FastestCopy

The fastest way to copy to (not from) high speed flash storage.

This is about 3-6x faster than file copy on explorer.exe to usb flash drives and sd cards which initially start out at high speed but then slow down to a crawl.

It is faster because it stops trying to copy for a very specific amount of time when it detects that its slow. Then it continues and again reaches the max speed of the device which has cooled off enough to stop throttling. Most devices do not thermal throttle correctly when they think they have bad blocks, and explorer.exe doesn't handle this very well.

Currenty this is just a first rough POC file that attempts to fill up a usb drive as fast as possible with repeating data, in order to agressively test for (and clear fake) bad blocks, but it is still 3-6x faster than explorer.exe.

The drive this was tested on was able to copy about 700MB at 20MBps before it would clock out and start going at a speed of less than 1MBps and an average response time of >5 seconds. During this time, the drive would heat up extremely quickly (and reach a temperature above 80C in under a minute). The drive was also reporting errors on windows, with drive caching disabled. Once the drive had been filled to the brim with repeating files via the POC program which was running 3-6x faster than explorer.exe, the drive was reinserted and no longer reporting errors, and copying of the newly emptied drive now commences at an average speed of 15MBps constant with explorer.exe, and the temperature never goes above 50C.

Please note that this POC was tested during a CME event that brushed earth, so it does for certain perform better than explorer.exe while under immense space radiation bombardment :).

Owner
Derek Frombach
Student Dev
Derek Frombach
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