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Windows 7: USB hard drive keeps disconnecting/disappearing


07 Jan 2010   #1
Stockmoose16

Windows 7
 
 
USB hard drive keeps disconnecting/disappearing

Hello,

I have a WD "My Passport" external USB drive that I connect as a backup for my system. The problem I'm having is that the drive keeps disappearing randomly. Sometimes I have to unplug it and re-plug it in 3 or 4 times before my computer recognizes it. I've tried several USB ports, and still have the same problem. The hard drive itself doesn't have a shut off switch, so it takes its cues from the computer power management system. When I plug the device in, sometimes the drive doesn't mount, but the power light on the drive will turn on.

Why is it randomly turning on and off? And why do I sometimes have to plug and unplug the device several times before it correctly recognizes it as a hard drive (with all its data in tact)?

Though my other USB devices do not randomly disappear while running, they often take three or four plug ins and plug outs before they're recognized in the first place.

How can I fix this, as I need a reliable backup drive always hooked up.


My System SpecsSystem Spec
07 Jan 2010   #2
Qdos

 

In power management (Control Panel) go into the advanced details of your power scheme and alter the settings which power-down your hard drives and USB interfacing to save energy - this will mean your device is kept running and is perma-detectable.

My System SpecsSystem Spec
07 Jan 2010   #3
Stockmoose16

Windows 7
 
 

Ok, I fixed those settings so that the drive won't turn off, but why does it sometimes take 3 or 4 attempts of unplugging and re-plugging in USB devices before they are recognized?
My System SpecsSystem Spec
07 Jan 2010   #4
Qdos

 

Please complete your system specifications in full for further help which is specific to your hardware...
My System SpecsSystem Spec
07 Jan 2010   #5
Stockmoose16

Windows 7
 
 

Quote   Quote: Originally Posted by Qdos View Post
Please complete your system specifications in full for further help which is specific to your hardware...
Ok, I just filled out the info. Any clues?
My System SpecsSystem Spec
07 Jan 2010   #6
whest

XP, Vista, W7 64bit Home Premium
 
 

My guess is you haven't got any hotswapping software installed so everytime you unplug it isnt safely removed. Have you got a bios that supports AHCI if not turn the PC off before you remove it then it should connect first go.
My System SpecsSystem Spec
07 Jan 2010   #7
TaraSWinTeam

Windows 7
 
 

Have you upgraded all your drivers?

Tara
Windows Outreach Team
My System SpecsSystem Spec
07 Jan 2010   #8
computersplus

Windows 7 Ultimate 32 bit
 
 
USB

in the device manager go to USB root hub properties and disable power management for the hub it will power down USB to save power
My System SpecsSystem Spec
3 Weeks Ago   #9
scw1217

FL
 
 

I am having this same problem. I have a new 2TB Fathom GreenDrive and can't copy more than 2 folders before it tells me the destination does not exist. I did what QDos suggested under Power Options. But that didn't fix it either. I can't find any power options under USB Controllers in Device Manager to change anything there. I'm getting uber-frustrated if any of you can help.

Computer is a custom build, so specs will take me a boatload of time to find. But it's Win7 64 bit.
My System SpecsSystem Spec
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 USB hard drive keeps disconnecting/disappearing




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