USB Storage devices on Windows 7 x64 - WORKING FIX

Ok. Now i'm already on 32-bit version of Windows 7 and so far happy with that. The only hurting loss is RAM, but all other things seem to be perfect.

But still, i remember (just a couple of weeks ago!) myself having pain with my external HDDs, portable player and other devices. So here i am, posting TEMPORARY fix for this.

From an elevated command prompt (right click on the command prompt shortcut, run as administrator):
1) Type "bcdedit /set truncatememory 0x80000000" (no quotes)
2) Reboot
3) Go to control panel -> System and Security -> view amount of RAM and processor speed.
- It should report 4GB (2GB available)

To undo this, open an elevated command prompt again:
1) Type "bcdedit /deletevalue truncatememory" (no quotes)
2) Reboot
3) Go to control panel -> System and Security -> view amount of RAM and processor speed.
- It should report 4GB

BE SURE TO UNDO "deletevalue" THIS FIX AFTER THIS ISSUE IS RESOLVED so you get all your memory back.

this fix was suggested at social.technet.microsoft.com, and it doesn't have any negative circumstances for your OS (at least, so far no reports), the only thing is that you loose half of RAM

What is this a fix for?

Zevaka said:

Ok. Now i'm already on 32-bit version of Windows 7 and so far happy with that. The only hurting loss is RAM, but all other things seem to be perfect.

But still, i remember (just a couple of weeks ago!) myself having pain with my external HDDs, portable player and other devices. So here i am, posting TEMPORARY fix for this.

From an elevated command prompt (right click on the command prompt shortcut, run as administrator):
1) Type "bcdedit /set truncatememory 0x80000000" (no quotes)
2) Reboot
3) Go to control panel -> System and Security -> view amount of RAM and processor speed.
- It should report 4GB (2GB available)

To undo this, open an elevated command prompt again:
1) Type "bcdedit /deletevalue truncatememory" (no quotes)
2) Reboot
3) Go to control panel -> System and Security -> view amount of RAM and processor speed.
- It should report 4GB

BE SURE TO UNDO "deletevalue" THIS FIX AFTER THIS ISSUE IS RESOLVED so you get all your memory back.

this fix was suggested at social.technet.microsoft.com, and it doesn't have any negative circumstances for your OS (at least, so far no reports), the only thing is that you loose half of RAM

I'm guessing this is a temporary fix for the external USB HDD problem that people (myself included) have been having, where the HDD will freeze and/or switch off when copying large files over to it. Forcing a restart of the system before the external HDD will show up again.
I finally solved the problem using a method I found elsewhere, this involved simply disabling the "memory hole remap" option in the BIOS settings, on my 4gb RAM this lowered my usable memory to 3.25gb. This didn't cause too much of a performance problem, or at least not one that I noticed.

Obviously these fixes aren't ideal but they will solve the problem for a lot of people I reckon.
As for me, I pretty much only need to transfer data to the external drive every now and again. So a slightly reduced usable memory and one system restart after transferring 400gb+ seems far more appealing than a system restart after every 2gb transfer.

Hopefully once W7 is finally released we will have a permanent solution for this.

Also, I read somewhere that this could possibly be an issue only effecting users with systems who have nVidia nForce 6 chipsets and up, whether that is accurate or not I don't know but maybe someone out there will find it useful to know.

This fix failed for my rig, and i have been investigating the issue for several days, i finally took it into work for some of my other colleagues to have a look and after failing with everything that we tried we have finally solved the issue by updating the bios to the latest version.

Prior to BIOS upgrade we were seeing the USB bomb out during a copy of large files to a usb stick, we were using a set of zip files totalling 2.34gb, after a bios update we have now copied the 2.34gb of files to and from the memory stick about 4-5 times now and have not seen any issues.

I have been reliably reproducing this issue on 2 boxes, different CPU's but same motherboards and am going to try this on my second box when i get home.

Hi i did a
bcdedit /set truncatememory 0x80000000 command and restarted and always start on startup repair tool.

dont know what to do, I change the value, deleted, changeit again, does it exist a way of restoring default values for that command line?+

on starup repair ive tried every option and every option in every option and cant solve the issue. recovery wont work im going to try recovery from command promp.
memory text ok.
auto start up repair seems cant solve this

runing sigle semprom with 4gb a compar cq50 101la

bios updated. bios restored to default.

nothing work here.