Jan272013

Why does my computer not detect my external hard disk?

StrangelyYours asks:

I use a fairly old computer. P4 with Windows XP. The 1 TB external Seagate hard disk I use is powered by an external power source.

When I plug it in, I can hear the hard disk working and it slightly vibrates in my hand as it usually does. The lights on the hard disk turn on normally as well. This hard disk has been working fine for the past 6 months now, but the computer can no longer detect it since yesterday.

I have tried plugging the hard disk in every port my PC has, front and back panels, but it won’t detect. Tried restarting the computer as well.

It has all my data and hence I really need this device to start working again.
Desperately need some help and suggestions


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System: Windows XP
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17 Answers - Write an Answer

1 votes
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Kuriakopoulos Marios

January 27, 2013

try the disk with an other computer. Maybe the problem is with the disk

Jack Catel

Hi,

I am agree with you and may be possible problem with your data cable so can also check. It is connected to its external power then connect with system if your external disk not access then you take expert suggestion. Read More: http://windowsdatarecoverytool.blogspot.in/

Thanks
http://diskrecovery.tumblr.com/

January 30, 2013
0 votes
Reply

ha14

January 27, 2013

go to device manager and see if your hard drive is listed there and if you see yellow sign, right click on it and choose uninstall (do not delete), while the hard drive is plugged reboot and see if windows will refresh the driver so that to be recognized.

Susan Tucker

I have the same problem with my hard drive…. bought it not even 3 weeks ago… I went into device manage …. what it the hard drive doesnt show up

January 31, 2013
ha14

does it work on another pc?

while the hard drive is plugged run this utiltiy
http://windows.microsoft.com/en-US/windows-vista/Tips-for-solving-problems-with-USB-devices

go into the BIOS and adjust the settings for Legacy USB Support or USB Device Legacy Support

1. Go to run and type cmd then right click on it and choose run as administrator
2. type DISKPART and hit enter
3. type : LIST DISK. This will show you all the connected disk with the offline one.
4. Now select the offline disk using the next command SELECT DISK where disk_no is the offline disk number which you can get from step 3 result.
5. Now you have selected the offline disk. Now enter command ONLINE DISK.

January 31, 2013
0 votes
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Earl John Dela Cruz

January 27, 2013

Try inserting the disk with another computer. If the disk was recognized then there’s a problem with the previous computer that you’re using. But if it wasn’t recognized, the disk might be damaged.

0 votes
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Ahmed Musani

January 27, 2013

scan your drive with seagate tools. http://www.seagate.com/support/downloads/seatools/

1 votes
Reply

Alex Schnapps

January 27, 2013

“1 TB external Seagate hard disk..”
Does it drive an optional external power supply? Or Y-cable? Old computer can deliver not enough current (0.5 A or less ) to the USB only for such a powerful drive normal work.

0 votes
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Breno Buckup Suleiman

January 28, 2013

if works in other pcs, u should chechk your software. if not, change the cable

0 votes
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FIDELIS

January 28, 2013

Hello, have you tried uninstalling the usb drivers? once you uninstall the driver from device manager, restart your computer and the driver will be installed by itself. Once that is done, try connecting the external.

Vertika

I went to Devices and printers selected my passports properties and uninstalled the drivers,unplugged the device,replugged it and it worked.
this was really helpful. Thank you :)

May 12, 2013
FIDELIS

I am glad it work out for you.

May 12, 2013
FIDELIS

I am glad it worked out for you.

May 12, 2013
0 votes
Reply

Jim

January 28, 2013

Take the hard drive to a different working computer, whether at a friend’s, public library, church, other, and see if it is recognized. If it is recognized, the problem is with your pc. If it is not recognized, the problem is with the hard drive.

0 votes
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Christian Cawley

January 28, 2013

You don’t say whether it is an IDE or a SATA cable connection, but if it is an older computer you should probably change the for a new one, regardless – best to rule everything out.

Also might try adaptor cables: http://www.usbnow.co.uk/Adapters_&_Connectors-USB_to_IDE_Adapters/c42_46/index.html

0 votes
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Gary

January 28, 2013

The drive may not have a mount point. Go to Start run > type “diskmgmt.msc” without the quotes. If you drive shows up then right click it and go to “change Drive letters and paths”. Click add and assign it a Mount letter.

If that doesn’t work it could be an issue of the drive not getting enough power in which case you could always take off the external HDD case and plug it straight into your computer with a standard Sata cable (assuming your motherboard has support for Sata drives). I would do this only as a last resort as it will no longer be a portable drive and will essentially just be another internal hard drive. It’s always better to try though as you will have access to your files.

0 votes
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Kostas P

January 28, 2013

Computer > Right Click-Manage > Disk Management > Change Drive Letter

0 votes
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Tech Nech

January 28, 2013

Go to device manager and check for the hard disk. See if it has yellow icon then uninstall the driver and check for any updates and install the driver back again. Hope this helps!

0 votes
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TerryM

January 28, 2013

If your version of Windows XP does not have SP1 or SP2 it will not recognize a hard drive beyond 127GB.

Also make sure the external drive casing will recognize your 1TB drive.

If both of these conditions are met, go into your disk manager from your Control panel and see if the drive is recognized but not assigned a drive letter. Assign a drive letter and you should be able to access from your Windows Explorer.

Control Panel -> Performance and Maintenance (or Administrative Tools) -> Computer Management -> Disk Management

0 votes
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Miguel Guzman

January 28, 2013

Sometimes, the hardisk gots a drive letter used by other (usually fixed) disk. Go to disk manager (Administrative tools…), search for your disk and change the disk letter

0 votes
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Danny Zamolxis

January 28, 2013

i have a bad feeling that is the board who connects the hdd to usb port and for that you have to take the hdd out of the box and connect it directly to the mother board of the pc or useing an adaptor or an external hdd rack

http://en.wikipedia.org/wiki/Disk_enclosure

0 votes
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John Delgado

February 4, 2013

it would take sometime before a P4 system to recognise a 1 TB external hd..try leaving it for hours..P4 is too slow for your external hd

dragonmouth

We are talking about a P4, not an 8086. If the drive is not recognized within one or two minutes, it will never be recognized because there is a problem.

February 13, 2013
0 votes
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andrew macaulay

February 16, 2013

I wanted to move a data disc to another computer.

I found that clicking import disc in device manager worked for me. (changed from “foreign”).

If you can “see” it in device manager but not in “my computer” this may make you happy.

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