U disk not fast enough? USB2.0 speed fix to lift u disk

With the improvement of technical level, the current USB3.0 control chip motherboard has gradually become popular in the market. Now in the age of all kinds of big file crazy, USB2.0 obviously already difficult to meet everyone's needs. For USB2.0 users who have been more popular in the past, unable to upgrade the motherboard chip we can also take another approach. The purpose of this paper is to exert the surplus value of dry UBS2.0 and play the residual heat of USB2.0.

　　What is the actual transmission speed of USB2.0?

In fact, USB2.0 's theoretical transmission peak is 480Mbps, simply speaking, is the 60MB/S data transmission rate. But you're definitely going to spit. Never tried such a high transmission rate. True, the maximum transmission rate that USB2.0 actually uses has been limited to around 20mb/s, due to outdated technical protocols and coding patterns.

　　How does USB2.0 transfer speed rise?

Some time ago Microsoft for USB device Access speed update a patch, it is a hotfix hot fix patch. Microsoft has not been pushed to the user like a regular system patch, so we can't use the patch as usual. (Go to the Microsoft website to download the patch) below we will personally start to update and open this USB2.0 accelerator patch.

First of all, we must login to the Microsoft website to download the system patch named windows6.1-kb2581464, Patch access method please look at the following figure:

Login to Microsoft website download USB2.0 accelerated hot fix patch

Agree to download USB2.0 accelerated hot fix patch

Fill in the Receive USB2.0 expedited patch mailbox

Confirm that USB2.0 has been sent to a personal mailbox

To a personal mailbox to find a patch address click to download

Download the USB2.0 to accelerate the hot repair patch, after decompression, double-click the installation directly. As for installing to that disk, see personal hobby bar. Small knitting feel this is not a 400K patch or directly installed to C disk bar.

USB2.0 Accelerated hot fix installation is done in two steps

　　How does the USB2.0 Accelerated hot fix feature open?

Simply installing the USB2.0 accelerator fix is not going to turn on the acceleration, and we need to add the INF device information of the storage device to the registration table ourselves. To connect the U disk and other mobile storage devices to the computer, in the Device Manager in the disk drive to find the current USB2.0 storage devices, right click Select "Properties", switch to the "Details" tab. In the properties drop down color TV, select "Parent", in the "Value" dialog box will appear a string of characters, where the vid_xxxx&pid_xxxx character is the USB 2.0 storage device unique INF device identification, such as small series of U disk INF device identified as vid_125f& PID_DB8A, combined is 125fdb8a. The method is shown below:

Find the unique INF device identification for a USB 2.0 storage device

Then the unique INF device ID is written to the registry, the Win+r shortcut calls the Run window, runs the Regedit in the window, opens Registry Editor, and finds Hkey_local_ Machinesystemcurrentcontrolsetcontrolusbstor. There are several subprojects under Usbstor, create a new item named 125FDB8A (Device ID), select it, right-click in the right margin of the window, and create a new DWORD value named "Maximumtransferlength", and then double-click, Change its value to 001FFFE0 (decimal value is 2097120, easy to say 2MB), and then save the reboot system.

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　　Test effect

Small series using a personal U disk to make a patch before and after the comparison test, testing software for Atto Disk Benchmark. In the patching money read and write speed respectively for 34mb/s and 11MB/S, after installing the patch read and write speed appear part of increase, the highest reading speed to reach 39mb/s and 14mb/s, the rate of promotion is about 15%. While this is a tiny fraction of the USB3.0 transmission rate, it's a good upgrade for those old USB2.0 devices.

Effect Comparison test chart

　　Written in the last

This article mentions that you must first add the device's INF code to the registry if you want to get the USB2.0 acceleration feature. In other words, if you have more than one U disk mobile device, you must first add the INF code, this is the USB2.0 patch defects. and USB2.0 accelerator only for USB disk, for SD card reader does not have any effect. However, USB2.0 accelerated patch is not useless, for the USB2.0 acceleration effect in large file transfer is still very obvious, and USB2.0 accelerator to use the method for the USB3.0 interface is also applicable. Also, if you want to improve the replication speed of your computer, you can also see the copy to install an accelerator! Limit replication speed up 100% the article to improve the computer itself copy mobile function.

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