Boost Windows 7 SP1 USB Storage Devices Performance by Increasing Maxi

[arkhi]

@Airbot

There was a mention of a requirement to create a registry key even though people siad "There wasn't". That's the point. Oh, and also the point that MS said that VVVV and PPPP are variables, not an actually key itself.

 

[Teerex]

Guys, guuys, this is probably something that will make sense only with USB 3.0, and the vendors will enable it by setting the registry keys with their inf files.

 

[bagavan]

Is it necessary to manipulate the registry???

 

[Airbot]

@Airbot

There was a mention of a requirement to create a registry key even though people siad "There wasn't". That's the point. Oh, and also the point that MS said that VVVV and PPPP are variables, not an actually key itself.

Actually, there isn't.

It says locate the subkey VVVVPPPP, and then create a new dword value inside of it. Doesn't say create the VVVVPPPP subkey itself at all.

 

[TBoyd]

I downloaded this hotfix in hopes that it would increase the data transfer rate of image files from a 8GB UDMA CFII card via a Lexar USB 2.0 reader. It created no improvement at all.

When I navigated to the HKLM\SYSTEM\CurrentControlSet\Control\usbstor\VVVVPPP subkey, I only found 4 different idVendors & id Products - none of which were my Lexar card reader. The USBSTOR for the Lexar is located in HKLM\SYSTEM\Control Set002\Control\DeviceClasses\{......} - So I hesitate to edit anything there.

I also have a virtual disk, so there is USB virtualization listed in my device manager as well.

I'm leaving this hotfix alone for now. - Not enough information from MS.

 

[MilesAhead]

What's your point? :huh:

:roflmao::roflmao::roflmao:


Ive tried now on several Hdds and Usbs and none show any significant increases at least on my devices

Danny

If they are blocking employee access to porn sites at Redmond then the guys probably need something to keep them awake.

edit: btw I have SIIG USB 3.0 Express card and if you factor in that Crystal Disk Mark considers 1000 KB a MB my quad core does sequential read at the rating of the WD caviar black 6 Gb/s drive. Namely around 126 MB/s (Crystal Disk Mark reads in the 130s since they consider 1000 kb a MB.)

My dual core with W7 reads and writes on a par with the capacity of the system drive. Typically sequential writes from the system drive to the HD in the USB 3.0 dock are in the 70 something MB/s range.. which is the capacity of the sending drive. I don't think there's any need to tweak it.

 

[Mercurial]

Its a trap!

 

[GeneO]

I looked at this a day or so ago but never had the VVVV/PPPP subkey even after installing the hotfix so didnt bother

View attachment 170137

Danny

The article says that for the ubstore/VVVVPPPP, the VVVV and PPPP are hexidecimal values that describe a USB device. In your case, ubstor/054C00C1 is one such USB device for which VVVV=054C and PPPP=00C1. So if you want to increase the transfer size for this device, you create the MaximumTransferLength dword in ubstor/054C00C1.

You don't literally create a ubstor/VVVVPPPP key and then create MaximumTransferLength in it. That will not do anything.

 

[arkhi]

Yup, because looking back at the KB article:

1. Locate and then click the following registry subkey:
   
   HKLM\SYSTEM\CurrentControlSet\Control\usbstor\VVVVPPPP

VVVVPPPP are italicized, which obviously means those are variables, not to mention the note below it that says they represent hexadecimal values.

 

[MilesAhead]

Its a trap!

And the cheese smells moldy.
:devil:

 

[Airbot]

I looked at this a day or so ago but never had the VVVV/PPPP subkey even after installing the hotfix so didnt bother

View attachment 170137

Danny

The article says that for the ubstore/VVVVPPPP, the VVVV and PPPP are hexidecimal values that describe a USB device. In your case, ubstor/054C00C1 is one such USB device for which VVVV=054C and PPPP=00C1. So if you want to increase the transfer size for this device, you create the MaximumTransferLength dword in ubstor/054C00C1.

You don't literally create a ubstor/VVVVPPPP key and then create MaximumTransferLength in it. That will not do anything.

So most of us were not getting it, including an off site posted article - my bad on that one. Understandable in the English you put it in. Thanks.

In the instance that I can't seem to find which 8 digit values corresponds to my device, I added the dword value to all 4 I have listed to test. Still no positive difference afterwards for my personal device.

 

[Coke Robot]

Why would they not have it set to 2MB to begin with?

That is a good question. Hate to be Captain Obvious here...

 

[xxxdannyxxx]

So most of us were not getting it, including an off site posted article - my bad on that one. Understandable in the English you put it in. Thanks.

In the instance that I can't seem to find which 8 digit values corresponds to my device, I added the dword value to all 4 I have listed to test. Still no positive difference afterwards for my personal device.

It seems like you can put that reg key wherever you like it doesnt make an ounce of difference to transfer speeds on any of my devices.Ive added it to all 8 digit values like you.So ive decided to put it in the best possible place..........the recycle bin!!!

Danny

 

[MilesAhead]

So most of us were not getting it, including an off site posted article - my bad on that one. Understandable in the English you put it in. Thanks.

In the instance that I can't seem to find which 8 digit values corresponds to my device, I added the dword value to all 4 I have listed to test. Still no positive difference afterwards for my personal device.

It seems like you can put that reg key wherever you like it doesnt make an ounce of difference to transfer speeds on any of my devices.Ive added it to all 8 digit values like you.So ive decided to put it in the best possible place..........the recycle bin!!!

Danny

I take it you suspect a Corbomite Enhancement ??

 

[xxxdannyxxx]

So most of us were not getting it, including an off site posted article - my bad on that one. Understandable in the English you put it in. Thanks.

In the instance that I can't seem to find which 8 digit values corresponds to my device, I added the dword value to all 4 I have listed to test. Still no positive difference afterwards for my personal device.

It seems like you can put that reg key wherever you like it doesnt make an ounce of difference to transfer speeds on any of my devices.Ive added it to all 8 digit values like you.So ive decided to put it in the best possible place..........the recycle bin!!!

Danny

I take it you suspect a Corbomite Enhancement ??

Take it as I suspect it just damn doesnt work At least for me.Lets see if anyone gets any speed increases.

Danny

 

[DaGooN]

This did not work for me.. but this guy seems to have got it working.
wonder if he was using USB3

KB2581464 : Increase Maximum Transfer Size Of USB Storage Devices For Windows 7 | TechGravy

 

[Airbot]

I'd have to question his results. Looks like BS to me.

 

[xxxdannyxxx]

Interesting that he says to create the subkey under usbstor and not as previously suggested inside all the 8 digit keys.

Danny

Does anyone really know where to stick it

 

[woolswell]

My test~~

Registry edit:


Test I:


Test II:

 

[TBoyd]

I was amused to read Tech Gravy's page. It appears that he didn't fully understand MS instructions. Nowhere did it say to create a subfolder VVVVPPPP.

I just had to try it for fun. No improvement resulted.