Win 7 x64 USB HD and Flash drive issues

[Andrey_au]

Good day,

I am relying a lot on my USB HD, as I'm running some virtual machines from it as well play around a lot with different USB flash drives.

I experince following problems:

1. I have changed settings in Dev Manager to Quick Removal in drive properties and in USB root hub "allow the computer to turn off this device to save power". I changed power profile on USB drives so they don't sleep ever.

From properties I had a look and hard drive consumes only 2 mA.

But still it won't can't disable write cache or whatever it is and for some reason my HD from time to time looses it's green light and looks like it went to sleep, VM start to perform slowly then... Afterwards i've tried to copy the VM from the USB HD to another PC. I had troubles safely removing the usb HD, and when I copy it says that the file is inconsistent. So I plugged the hd back into my win 7 laptop and copied the files over the network and everything went fine...

My suspicion on power issue is: from time to time I charge my BB from my laptop, and if I look in Dev Manager BB and HD will always be under same USB hub, i've tried plugging in devices into 3 different ports separately and anyway they will be under same USB hub.

So i have decided to test on my USB mouse. If i plug it into different ports it comes up under different USB hubs...

How does that work?!!!

2. Just USB flash drives. Sometimes they come up sometimes they don't. Depends on the content of the drive, if I plug it into anything else. even to a VM on same Win 7, it will work just fine...

Anyone experienced same or knows workarounds fixes?

Thank you,

Andrey

Edited June 22, 2009 by Andrey_au