Question about Hitachi (H3640US) 640 GB USB 2.0 Hard Drive

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Cannot get my computer to read Hitachi H3640US hard drive. Power on at drive and light on, but when connected computer does not recognize. When I turn drive on, the light does not cycle.

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  • Hitachi Master
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Make sure the lead/s that attach to this drive have a secure seating and are not bad/faulty the light on only tells that its getting power it might not be getting enough power you might test the lead/s or
just replace the cable of the hard disk, when you plugged the external disk drive you got that windows could recognize the USB device change the cable everything should work fine again, sometimes the wires inside the cable will be damaged due to bending or stretching or placing heavy equipment upon the cable,
hope this helps

Posted on Apr 06, 2011

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Posted on Jan 02, 2017

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External hard drive not accessible


A Hitachi USB external hard drive is a device that acts as portable, removable storage for your personal computer. If you need additional space to house files on your computer but don't want to go to the trouble of installing an internal drive inside the case, a USB external hard drive is your best option. These drives are "plug and play" devices, which means that very little can actually go wrong. If you're having problems, fixing them shouldn't take more than a minute or two.

Check your connections. A USB cable needs to be connecting your Hitachi external hard drive to your computer. Your external hard drive's power cable also needs to be plugged into a functional wall outlet, surge protector, extension cord or power strip. Make sure your Hitachi USB external hard drive is turned to "On." An "On/Off" button is present on the front of the unit. If the indicator light around said button is not illuminated, the drive is "Off" and your computer won't be able to recognize it. Press it to turn it on and then try to access your drive again. Format your hard drive. If your Hitachi USB external hard drive doesn't currently have a file system on it, you won't be able to use it to store data. Open up the "Computer" icon in the "Start" menu. Right-click on your USB external hard drive's icon and click "Format." Click "Start." This will install a file system on your Hitachi USB external hard drive. After this process is finished, you will now be able to use your drive. Restart your computer. Certain models of computers (especially older models) won't recognize new hardware unless your computer boots with the hardware already connected. Leave your USB drive plugged in and restart your computer. Once you do this, your Hitachi USB external hard drive should appear as normal in the "Computer" folder with all of your other drives. Hope this helps.

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1 Answer

My hard drive is not being recognize


A Hitachi USB external hard drive is a device that acts as portable, removable storage for your personal computer. If you need additional space to house files on your computer but don't want to go to the trouble of installing an internal drive inside the case, a USB external hard drive is your best option. These drives are "plug and play" devices, which means that very little can actually go wrong. If you're having problems, fixing them shouldn't take more than a minute or two.

Check your connections. A USB cable needs to be connecting your Hitachi external hard drive to your computer. Your external hard drive's power cable also needs to be plugged into a functional wall outlet, surge protector, extension cord or power strip. Make sure your Hitachi USB external hard drive is turned to "On." An "On/Off" button is present on the front of the unit. If the indicator light around said button is not illuminated, the drive is "Off" and your computer won't be able to recognize it. Press it to turn it on and then try to access your drive again. Format your hard drive. If your Hitachi USB external hard drive doesn't currently have a file system on it, you won't be able to use it to store data. Open up the "Computer" icon in the "Start" menu. Right-click on your USB external hard drive's icon and click "Format." Click "Start." This will install a file system on your Hitachi USB external hard drive. After this process is finished, you will now be able to use your drive. Restart your computer. Certain models of computers (especially older models) won't recognize new hardware unless your computer boots with the hardware already connected. Leave your USB drive plugged in and restart your computer. Once you do this, your Hitachi USB external hard drive should appear as normal in the "Computer" folder with all of your other drives. Hope this helps.

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1 Answer

I Have a Hitachi Lifestudio hard drive attached to my Apple G5 for 7 months now, and suddenly just dessapear of my desktop or menu the Computer it won't recognize it anymore HELP!!!!!!


ry connecting the external hard drive to another computer to recover/backup your data.
When you have such a large capacity hard drive, it pays to have a second large capacity hard drive to backup your data in the event of the other hard drive dying.Hard drives do fail especially if you accidently drop it.

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I bought a Hitachi z5k320 hard drive trying to install it, and windows, but my computer won't recognize hard drive. how can i get it to recognize the new drive. can't do anything until that happens.


As long as you are sure the hard drive is connected properly with SATA cables to the motherboard and has power from the power supply unit, and that the drive is working, you can enter the BIOS on computer startup and modify the "boot device" look in "primary boot device" for a name matching that of your hard drive (probably "HITACHI .....) If it is there select it as the primary device and hopefully it will boot and ask you to install windows. If it is not there the drive may not be connected or it may need to be replaced. Hope this helps!

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I connected my Hitachi xl 1000 external hard drive and my computer is not recognizing any new drive. The drive is working, the light is on, and I can hear him work, but wont be recognised by my laptop.


Try another cable and make sure the connection is in all the way. Also try it on another port or computer. If you need more help, please call HitachiGST Tech Support M-F 8AM to 6PM PST at 1.888.426.5214 and a technician will be happy to help you.

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Installing Hitachi Deskstar 40 GB drive as slave. Where do the connectors go. It says model IC35L060AVV207-0. Installing drive in Dell 4600


Look at the "connectors" end of the disk-drive.
There will be a set of thin pins for the "data" cable,
and thicker pins for the "power" connector,
and a smaller grid of small pins.
It's these pins that will be labelled/engraved on the casing:
MA(ster), SL(ave), C(able)S(elect).
Move the jumper to the "slave" setting.
Connect to the power connector.
Connect to a "data" cable.
When you add power to your computer, it should recognize the drive.

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1 Answer

Brand new, not recognized by hardrive


Try plugging it into the back ports of your computer haven't already. The clicking is from the reading head not finding zero on the platter, which means its either a bad drive or a lack of power. So try the back ports first if you haven't already, because they usually supply more power than any front ports. It also depends on how old your computer is, but in general if it has XP on it it should have enough juice to power the drive.

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