Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Buffalo External USB 2.x HDD keep disconnecting

18 Mar 2011   #1

Windows 7 Ultimate x64
Buffalo External USB 2.x HDD keep disconnecting


This one is really bugging me because I have checked everything, and I cannot fathom out what is causing the disconnection apart from, either is a MB issue or driver issue...?

Whenever, I turn on my computer and Windows loads it will not load the USB External HDD which has been set to AUTO so it will load when Windows loads. I have tried manual switch but this does not work either. The HDD is a combo HDD with Firewire and USB 2.x although, if I use Firewire instead its fine...?

What is happening is that Device Manager in disabling the device for some reason, and the only way in which I can get Device Manager to recognise the "EXT HDD" is to search for new hardware and then it works...?

The only thing that I found to be a little odd was there is no set power showing for the USB Mass Storage Device 0 mA I know it is the right port location because it is the same number.

Any ideas why this has started to do this...? Any suggestion would be deeply appreciated.

There is something I forgot to mention and that is the battery needs replacing. I have never had a battery die on me on a motherboard ever. The only conclusion I can think for the reason why the battery has been drained in the ROC Logo on the MB I used to leave on and I think it drained the motherboard battery. If the power is terminated, example the PSU is turned off then I have to reset the BIOS. Although, I don't think this is related but I thought I would mention it.

My System SpecsSystem Spec

19 Mar 2011   #2

Windows 7 Ultimate x64, Mint 9

It wouldn't hurt to pick up and install a new battery.

You should also take a look and try to find the USB drivers for your motherboard (or just the motherboard drivers), as it sounds like it isn't recognizing it properly. Also make sure that Legacy USB support is enabled in BIOS.

My System SpecsSystem Spec
22 Mar 2011   #3

Windows 7 Ultimate x64

Yep picking one up this week from PC World. I been custom building my own PC for over 10 years now and I have never come across a motherboard that the battery has gone dead ever. I think it was because there are lights on the MB which when turned off are powered by the battery and this has caused the battery to go dead. you can turn the lights off within the BIOS. But it looks pretty in the dark... OMG what a lame excuse I should be ashamed of myself.

Intel Chipset Drivers is installed and the latest drivers, although... am I correct in saying... W7 installs drivers for USB itself before you install Intel Chipset Drivers. Also if this was a driver issue wouldn't it be the same problem when the HDD was set from Auto to on position...? FireWire works fine no problems "ON/USB" works fine no problems, there is an intermittent problem with USB. No other hardware attached has any problems with USB only the HDD.

There are three settings | AUTO/USB | OFF | ON/USB/FireWire |

USB devices connected:
Monitor/Webcam/Wacom Tablet/Pen

USB devices connected to MB
Monitor (as above)
USB Receiver (keyboard and mouse)
Steering Wheel
Biometric scanner

At any given time there are 6 connected, which is within the recommended connected USB devices, although these days I don't think it matters how many are connected. Oops I forget connected to the MB via chassis there is another two USB which are not used all the time.
My System SpecsSystem Spec


 Buffalo External USB 2.x HDD keep disconnecting

Thread Tools

Similar help and support threads
Thread Forum
External HDD Keeps Disconnecting Itself
Anyone know why my external HDD keeps disconnecting itself? It used to do it with my old PC, and I thought it was due to the slow processor, but the new one should be fast enough. Also, my other 120gb external HDD used to do it too, so I always thought it was my old PC's fault. But now that my...
Performance & Maintenance
USB External Hard Drive keeps disconnecting.
Hey, Windows 7 x86 I've got an USB External Hard Disk Drive (Samsung S2 Portable 500 Gb). In the last 3-4 days it keeps randomly disconnecting when in use... So, Windows starts, it runs fine for an hour or so (in use), then the magic sound strikes. After a couple of seconds it's detected...
Hardware & Devices
Buffalo HD-PET640U2/R-EU external HDD not recognised
Buffalo HD-PET640U2/R-EU Hello. I've been having problems with the above drive (similar to this previous thread). I've had the drive for about a year & a half. It worked fine (on Win XP Home) up until a few days ago, when I connected it to my new laptop (Win 7). On connecting, a...
General Discussion
WD My Passport Essential 500GB External Keeps Disconnecting from USB3
Hi all, So today i brought a new External hard drive today and started copying files to it (as you do) from my PC (usb2) it worked fine, but then when i connect it to my latop (TOSHIBA satellite L840) it keeps disconnecting within 5 seconds of copying regardless of file size ONLY when its...
Hardware & Devices
External HDD disconnecting from PC
Hello, I bought new external USB 3 harddisk (Verbatim External Hard Drive 2TB USB 3.0) this christmas and I've got a little problem. Sometimes disk just disconnect from computer. When I turn on computer everything is ok but sometimes after hours it just disconnect. I tried to change USB slot but...
Hardware & Devices
cannot go into BUFFALO External HDD(window 7)..
I can somehow "see" it in my computer but cant recall what does! appear in my laptop but just cant see it at "my computer" place for me to double click it and go inside..access the content in it.. my friends Vista and XP hav NO PROBLEM at all to get access into this BUFFALO...
Hardware & Devices

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 20:39.

Twitter Facebook Google+

Windows 7 Forums

Seven Forums Android App Seven Forums IOS App