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My external hard drive wont work on my laptop the light comes on so it is powered but i cant locate it anywhere to access it wen i click on the short cut it just says its unavailable

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  • georgehunt77 Dec 09, 2008

    i followed the instructions that you gave to me previously but in the right hand column it only listed my (C:) drive is there anything else i could please.

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Hmm. then it sounds like it may have gotten corupt. You didnt unplug it while it was in use did you. This can damage the file system and make the hard drive un-usable. have you tried it on any other computer? If no other computer can detect it either then that means you probably lost whatever is on it because the file system got screwed up and cant access anything.

Try it on another computer, if it doesnt work, then we know its toast and we can try booting into the windows install cd on boot and using the windows installer to re-partition it.

If this is the case, let me know and we can do that. To do it, you have to do this:

1: Plug in the hard drive, put your windows XP disk into the CD drive and boot from CD on start up. ( just like installing windows)

2: After the blue screen loads and has some options, go to install windows and it should show your laptops hard drive and the external hard drive.

3: Be sure to select to delete and re create partion on the External hard drive. NOT C: Drive as this is your laptop hard drive.
It will ask if you want to create NTFS or FAT32. Select NTFS.

4: When its done it will be a empty partion and will go back and ask if you want to install windows again. Cancel out of the windows installtion and reboot the computer, when windows loads you should be able to go into MY COMPUTER and see it now.

It will be like brand new and all data will be gone, this is because windows had to format it before re-creating a partition.

This is if you are sure you cant get access to it at all from any computer and have no hope of recovering the data thats on it at all.
If you feel you want to try other methods first, by all means go for it.

I have had to do this at my job with alot of teacher PIN drives and USB thumb Drives because they pull them out while there transfering files and corupt the file system on them.

Let me know

Posted on Dec 10, 2008

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First of all, The shortcut only works if its connected and if its assighned a different port, then it wont work, so just go ahead and delete that for now.

Right click on " My Computer " and select " Manage" When that opens, select " Disk Management " and on the right side it will show all storage devices such as any plugged in pin drives or network drives or external hard drives.

You should see it there and it has a letter attached to it. I.E. C: for your main hard drive, A: for floppy if you have one, D: is normaly the CD Drive.

Depending on what you have or if your on a network, you should see your hard drive, probably as E: or something different.

If you have had alot of different storage devices connected or network drives, it could be that the drive letter its trying to give your Hard drive has already been issued to something else.

on the right, select the external drive ( be sure thats it, dont go changing you C: drive by mistake )

right click and select ( Change Drive letter )

Then change it to something you know isnt in use like Z: or W:

apply, close and windows should recognize the drive and you should have access to it.

If not, come back and we can go from there.

Posted on Dec 01, 2008

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Cant detect hdd


Hi Martin...

The problem is being caused by the Logical Disk Manager
Administrative service and possibly the logical Disk Manager service
not being started or the services might be disabled. to solve the
problem, click on the "Start" menu, click the "Run" command, and then type
in the box: services.msc , scroll down until you see both the above services.
right click on each of the services about and select properties, on the
general tab, change the startup type to "automatic" and click the start
button under the service status. do this for both of the services, and
that should will fix your problem."
-------------------------------------------------------------------------------------------------
For Windows 2000 and XP:
Right click on My Computer.
Choose Manage (This will open the Computer Management window).
Go to the Storage category and select Disk Management
Right click the new drive (usually listed as Hard Disk 1) and "initialize"
You now have the option to partition and format the drive.
The default settings of Primary Partition and NTFS- Quick Format are recommended for most users.

-------------------------------------------------------------------------------------------------
External hard drive can not be recognized, are more common on computer
failures, what's the reason caused this failure?
1, Setting the CMOS parameters
If you never used the USB external device, there may occur the case:
The system can not detect USB hard drive even if the driver is properly
installed, which was mainly due to the motherboard CMOS default port is closed, if not set to
open state, it naturally Windows can not detect the external hard drive. In order to solve this
problem, we can re-boot into the CMOS settings, and set "Assign IRQ For USB" to "Enable" in
"PNP / PCI CONFIGURATION" column, now the system can be assigned to the USB port available
interrupt address.
2, Power shortage
As the USB drive need to consume some power when it at work, if directly through the USB interface
to take power, the power supply may be not enough. Thus, almost all of the external hard drive
comes with a separate external power supply or a PS2 keyboard to take power transfer interface,
at this time you should connect external power supply or through the transfer cable ps2 connected
to keyboard to ensure that it have provided adequate power to the external hard disk,
recommended that you should ensure the external hard drive have adequate power supply when you
use it, otherwise, the external hard disk is likely to be damaged due to insufficient power
supply.
3, USB extension cable fault
USB interface type does not match the external hard disk interface ,this case caused it can not
be used. For example the standard USB interface of the computer configuration is 1.1, while the
external hard drives purchased are USB 2.0, which requires the cable connected computers and
external hard disk must support USB 2.0 standard. Because high-speed mobile device plug in a
low-speed hub, the device may not be properly installed, and some people use external hard disk
while using USB flash drives, For convenience, they directly used USB 1.1 standard cable that
supplied by USB flash drives, as a result, the USB 2.0 standard hard drive not be recognized
correctly. Just replace it by the USB 2.0 standard cable can solve this problem.
4, Windows version is too low
Pre-Windows 98 operating system does not support USB peripherals, so in any case to install the
driver, set the CMOS parameters are unable to make normal use of external hard disk. In this
case, one solution is to upgrade the operating system up to Windows 98, another way is to
Microsoft's official site, download the appropriate patch to make it can identify mobile hard
disk.
5, The system is set incorrectly
When installed driver, the external hard disk icon will be seen on the Device Manager for some
Windows 98 users, but the Explorer does not include the corresponding letter identification,
which is improper system settings. In the Device Manager, double-click the Hard Drive icon, and
click the pop-up window in the "Properties" button, and you could see disconnect, could be
deleted, synchronous data transmission and Int 13 unit four options, of which "could be deleted "
is no tick in front of the system, and simply check this option to restart your computer, you can
see in the Explorer, the new external hard disk drive letter.
While the failure of the external hard disk does not recognized are more the reasons, but
generally not the USB interface or external hard disk's own fault, so it requiring us to consider
some more from around the association when exclude it, I believe you can successfully use the
external hard disk.
--------------------------------------------------------------------------------------------------
Hi I had the same problem and solved it like this assuming that you are running windows xp

With your external casing powered-up (it does not get power through USB does it?) and your WinXP
PC running, plug in the USB.
You should hear 'chime', what happens then?
If harddisk is recognised here, but does NOT have a drive-letter and cannot be seen in Windows
Explorer, the answer is in Windows Disk Management
...
Go Administrative Tools > Computer Management > Disk Management. ( on left column)
Maximize this page. Physical Drives appear at the bottom; Logical Drives at the top.
Hopefully your drive will appear at the bottom (physically), you must then 'import' it into the
Windows installation
; Windows will put its 'signature' on the drive and assign it a logical drive letter :^)
you can try to format it here if it is new and has no info on it , check back to My computer and see if present.

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1 Answer

Computer not recognizing external Hard Drive


Aren't usb drives fun? Anyway, there are a few points where this can break down. Your external drive is actually made up of a few parts. It has a normal hard drive, and either what is called a "SATA to USB Bridge" or a "IDE to USB Bridge". If it is a full desktop size hard drive, it will come with a power supply that you plug into the back of the drive. If you have a laptop hard drive it can be powered through the usb port.

When you plug it in, the computer should recognize that you plugged in a new device and show you a message saying found new hardware, found usb to ata bridge, found disk drive etc. in that order. If you get these messages and still no hard drive shows up in my computer, then you may need to assign a letter to the drive or even format it. Right click on the "My Computer" icon, then select "Manage". On the right hand side of the window that appeared, double click storage, then disk management. It should list all drives attached to the computer. Your TB drive should show up as a removable disk, and should already have a partition. If it does not have a partition, you will have to partition it. Just right click on the rectangular part (on the right side) and select format. If you cant format it, try right clicking on the left hand side, the square bit, and select initialize. Then format.

If you just need to set a drive letter, right click on the rectangular part and select 'change drive letters and paths"

Here are some other things that can go wrong:

Not enough power, the drive isn't getting enough power and cant mount. Try plugging in the power adapter that came with it or try a different usb port. If it came with one of those funny looking Y shaped usb cables, plug both ends into the computer, so that it can get enough power.

Bad hardware, either the hard drive or the bridge is bad.

Then you need to return it to the store you got it from. If that is not possible you may be able to pull the drive out of the enclosure and use it as an internal drive.

Bad USB ports.

This can be hardware or software. If other usb devices work fine then this is probably not the case.

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1 Answer

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Boot up the laptop then plug this USB hard drive adapter into the laptop's USB port. The laptop will see this as an external USB hard drive. You can open the various folders and files on this external drive and copy the folders and files to the laptop.
You can delete the Windows folder and Program Folders on this external drive to free up disk space and use this as a back up drive etc.
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chaw

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