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: Windows suddenly stopped recognizing external drive

14 Jun 2017   #1

Microsoft Windows 7 Ultimate 64-bit 7601 Multiprocessor Free Service Pack 1
Windows suddenly stopped recognizing external drive

I have a five month old 4tb external Seagate drive that suddenly disappeared from Windows explorer & I couldn't access its data. After rebooting my PC, it showed up again, albeit with its custom icon missing (it has since reappeared after I unplugged & plugged the drive back in) & seems to be working fine at the moment.

I ran Seagates diagnostics software SeaTools & the short generic test failed despite that the drive shows 'healthy' in every other s.m.a.r.t. software. The SeaTools short drive self test passed & Crystal Disk, DiskCheckup & Windows disk management all say the drive is fine. I ran a short test with GSmartControl & it returned no errors & shows the drive as being healthy.

I'm skeptical of these 'fail' results because all three of my external USB drives fail the same test (two Seagates, one WD) while appearing healthy otherwise & passing other tests. I read online some other people whose drives failed the SeaTools short generic test but passed the longer more thorough version of the same test. This PC is about 9 years old so I don't know if the age of the usb ports plays a role.

What should I do? Run windows check disk or SeaTools 'fix'? Or should I assume the drive is fine?

EDIT: I'm becoming more convinced the software is faulty. From googling:

I bought 3 brand new Seagate Expansion 2TB drives yesterday. Before using them, I ran Seagate diagnostic tools on both drives and both of them have failed the "Short Generic test".

I have not tested the 3rd hard drive yet.

My nextdoor neighbor also bought the same hard drive brand new, and it is also failing the same test.

4 new drives all failed the short generic test using SeaTools lol, so obviously there is a problem with the diagnostic software. All hard drives passed a full error scan in HD Tune with flying colours.

It's pretty bad though when you can't rely on the official diagnostic software for your drive (at least through usb interface as it does seem to be fine/accurate when scanning the drive through sata).
Seagate Tools - HDD - Failing Short Generic Test - Normal?

Why am I asking this? Well I've purchased a new Seagate Expansion HDD from NLG (around a month ago), upon testing it with Seatools right after purchase, the hdd failed the Short-Generic-Test. Went back to store, had a replaced, no fuss, and what do you know, same issue with the replacement, failed Short-Generic-Test. Ended up getting a store-credit.

Today, testing a hdd at work, same issue (failed Short-Generic-Test) (however reason for testing was that a proprietary app randomly freezing, so just going through the usual TS).

My System SpecsSystem Spec
14 Jun 2017   #2

Windows 7 Home Premium 64 bit sp1

Hi Jarvismciiggles, welcome to the Forum.

External HDD intermittent operation can be due to low voltage output from the USB ports. As you have mentioned the PC 9 years old, so the PSU (Power Supply Unit) might also be getting tired. You could try replacing the PSU as suspect ones often cause random problems.
My System SpecsSystem Spec
16 Jun 2017   #3

Microsoft Windows 7 Ultimate 64-bit 7601 Multiprocessor Free Service Pack 1

Thanks for the response. I hope it is the psu & not the external drive because I'm about to replace the computer anyway.

So, given the results of this test, should I just assume my drive is fine?
My System SpecsSystem Spec


 Windows suddenly stopped recognizing external drive

Thread Tools

Similar help and support threads
Thread Forum
Windows suddenly stopped recognizing me as Administrator
I bought a computer running Windows 7 64 bit about 6 months ago and I've been using it daily without a problem, but today when I turned it on, I found that I cannot use any program that requires Administrator privileges. I have only one user account and my user info in the Control Panel shows that...
General Discussion
SD Card Slot on HP Desktop suddenly stopped recognizing cards
I have an HP desktop running Win 7 Pro. My DSLR uses SD cards, and I have always been able to insert the card into the slot, have a little green light come on, then a few seconds later have the card launch a new instance of Windows Explorer showing the card as Drive G. Suddenly (within the last 48...
Hardware & Devices
Windows 7 not recognizing external hard drive
I have windows 7 64 bit and I'm trying to copy data from my old desktop which won't boot up anymore to my laptop. It is a 3.5 inch sata hard drive which I connected to a usb external hard drive dock. But when I plug it in windows just doesn't recognize it and it doesn't appear in windows explorer....
Hardware & Devices
PC stopped recognizing my external HD but other PC/Laptops still do
One day my main desktop stopped recognizing my external 2.5 HD (uses to 2 usb ports for power). Even in "disc management" its not recognized, but the interesting thing is, all other usb devices work perfectly even all thumb drives. I originally thought my HD was starting to fail, but later...
Hardware & Devices
Windows 7 Not Recognizing External Hard Drive
I just got a Seagate Barracuda 1.5 TB internal hard drive. Model Number: ST315005N1A1AS-RK. And I put it into a Rosewill external enclosure. I live at college so my father formatted it for me before sending it to me at college using Windows XP x86. My father moved some files onto it before...
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 01:05.
Twitter Facebook Google+