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1TB external hard drive with no power cord required (runs on USB 2.0)

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April 10, 2009 3:12:43 PM

As I understand, a 1TB external hard drive with no power cord requirement (just USB 2.0) is not available today.

Will one be available in the forseable future? 6 months? 1 year? Any thoughts would be welcome.

-Alok
a b G Storage
April 10, 2009 4:30:34 PM

Not likely. The external hard drives that do not require a power cord are all based on notebook hard drives, due to their lower power requirements. The sacrifice is in capacity though - the largest current ones are only 500GB, and they aren't likely to reach a TB very soon. Maybe in a year and a half or so?
Anonymous
a b G Storage
February 28, 2010 4:42:15 AM

do you know any 500 gb drives without power supply. please suggest.
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March 8, 2010 10:15:15 AM

Quote:
do you know any 500 gb drives without power supply. please suggest.


I recently bought a 1 TB Western Digital 2.5" external hard drive which does not require additional power connection (AC adapter). Just a single USB connection for both data and power.

It costed me USD 179.

I found quite a 500GB 2.5" ext hard drives, priced at around USD 120. Good ones.

Note of caution: Could be an individual case, but it did not work and am getting it exchanged (at BestBuy)

KC.
a c 342 G Storage
March 8, 2010 2:38:38 PM

Here's a link to that WD unit:

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

It happens to be the ONLY one Newegg sells that is 1 TB in a 2.5" (laptop portable) form factor. I did not bother to try to search all the 3.5" form factor units in case any of them works with NO power supply of its own. I think it was a post by sminlal in another thread that altered me to this unit.
a c 415 G Storage
March 8, 2010 5:24:10 PM

cjl said:
...the largest current ones are only 500GB, and they aren't likely to reach a TB very soon.
As Paperdoc posted, there actually are 1TB drives in the 2.5" form factor, and you can buy them in USB-powered external enclosures. The trick is that the bare drives are thicker than a standard laptop drive bay, so you can't actually use them in most laptops. But of course that doesn't prevent companies like WD from building an external enclosure around them.

The WD drive was announced in July last year. Here's a link to WD's spec page for it: http://www.wdc.com/en/products/Products.asp?DriveID=685

Seagate has a similar drive, and other manufacturers may well have them too.
August 22, 2010 4:02:39 PM

How about I buying an "internal hard drive" and buying a "hard drive case" along so as to use it as an external hard drive without the power supply??
I have heard that without the power supply the hard drive has the chances of crashing.....Is it true??
If possible, rply at aman.taneja.2008@gmail.com
a c 289 G Storage
April 5, 2011 1:12:09 PM

I have had bad experiences with these. It's sort of borderline whether or not they will work on that power; one even came with a Y cable to suck power from two USB ports. Please be aware that this is a little iffy.
a c 288 G Storage
April 6, 2011 3:28:15 AM

FYI, some newer Gigabyte motherboards can supply increased power to a USB port. This feature is enabled via a driver.

http://www.gigabyte.com/microsite/102/data/mb-usb3.htm

"The 3x USB Power Boost from GIGABYTE is designed to deliver the utmost compatibility and stability for USB devices, such as external storage devices or optical drives, by supplying sufficient power through a single USB port."

"3x USB power from USB 2.0 ports is available with certain models only."

On/Off Charge / 3X USB Power Boost Driver:
http://www.gigabyte.com/support-downloads/utility.aspx?...
http://www.gigabyte.com/microsite/185/on-off-charge.htm

Supported chipsets:

Intel P67 / H67 / X58 / P55 / H55 / H57 / P45 / P43 / G41 and AMD AM3 / AM2+ / AM2 series MB

Supported OS:

Windows XP 32bit, Windows XP 64bit, Windows Vista 32bit, Windows Vista 64bit, Windows 7 32bit, Windows 7 64bit
a c 342 G Storage
April 6, 2011 3:46:30 AM

This thread started 2 years ago when OP's quest was difficult at best. NOW, however, there's a different solution possible. The USB3 port system provides more power on a port than was available in USB2. Hence IF your machine has USB3 ports, you can now buy USB3 External HDD's in capacities over 500 GB that do NOT need their own power supply. They can run solely off the power available from the USB3 port. For example, this is what I got by searching the egg for External hard drives with USB3 interface and capacities 1 TB and up - 84 units to check out:

http://www.newegg.com/Product/ProductList.aspx?Submit=E...
a c 288 G Storage
April 6, 2011 11:28:46 PM

Let's say one has a USB 2.0 external port-powered drive connected to a USB 3 host. Will the 900mA current limit be available in USB 2.0 mode, or will the host controller revert to a 500mA limit? Furthermore, I know that Seagate's Momentus 500GB drives draw 850mA during spin up. Will a 1TB drive, which presumably uses more power (?), exceed the USB 3 current limit?
!