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Old Jul 20, 2012, 04:13 AM   #1
fleawannabe
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USB 3.0 External HD not working

I have an external Toshiba USB 3.0 HD and my 2012 MBP 13 will not recognize it. My PC laptop has a SATA input that will recognize it up but the USB ports on PC will not. My 2007 iMac recognized it and so does my PS3. I have been doing some reading and it seems like there is not enough power coming from the USB ports on my 2012 MBP to run it. Any ideas on how to fix this? Will ML fix it. Is there a different 3.0 external HD that takes less power and that will work.
Please help me. Thanks.
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Old Jul 20, 2012, 04:19 AM   #2
KMC1993
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Don't know how to increase the power available to the USB ports but the WD my passport essential works with the 2012 macbook pro 13
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Old Jul 20, 2012, 04:26 AM   #3
luigi.lauro
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Quote:
Originally Posted by fleawannabe View Post
I have an external Toshiba USB 3.0 HD and my 2012 MBP 13 will not recognize it. My PC laptop has a SATA input that will recognize it up but the USB ports on PC will not. My 2007 iMac recognized it and so does my PS3. I have been doing some reading and it seems like there is not enough power coming from the USB ports on my 2012 MBP to run it. Any ideas on how to fix this? Will ML fix it. Is there a different 3.0 external HD that takes less power and that will work.
Please help me. Thanks.
I'm in the same boat as you.

Bought a cheap Toshiba 1TB USB3 drive to work with my old MBP17'', when I upgraded to the rMBP I was happy I could be finally using it as USB3 instead of USB2, and then I found out that doesn't work with my new rMBP because of the voltage issue.

I ended up giving my 1TB Toshiba drive to my wife, and buying a cheapo Seagate GoFlex FreeAgent 1TB USB2.0 for my rMBP.

In the future I plan to buy a Thunderbolt based 2 drives Raid-1 disk for Timemachine backups, and keeping this cheap one for backups while I'm on the move, keeping it always with me.

Last edited by luigi.lauro; Jul 20, 2012 at 04:34 AM.
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Old Jul 20, 2012, 04:33 AM   #4
Macman45
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A simple but not too elegant solution if you want these drives to work is to buy a powered USB hub, then plug the drive into it:
http://www.amazon.co.uk/s/ref=nb_sb_...+3+Hub&x=0&y=0
Take your pick, but make sure it's USB3
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Old Jul 20, 2012, 04:43 AM   #5
fleawannabe
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Originally Posted by Macman45 View Post
A simple but not too elegant solution if you want these drives to work is to buy a powered USB hub, then plug the drive into it:
http://www.amazon.co.uk/s/ref=nb_sb_...+3+Hub&x=0&y=0
Take your pick, but make sure it's USB3
Thats an option but I bought a laptop to be portably, the hub kind of ruins that.

Quote:
Originally Posted by KMC1993 View Post
Don't know how to increase the power available to the USB ports but the WD my passport essential works with the 2012 macbook pro 13
Is your WD 3.0? If so could you post a link of it so I can go get one.

And any thoughts one ML, is it possible for that to fix these issues?
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Old Jul 20, 2012, 05:27 AM   #6
KMC1993
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Originally Posted by fleawannabe View Post


Is your WD 3.0? If so could you post a link of it so I can go get one.
Yes it is USB 3.0.
http://www.pcworld.co.uk/gbuk/wester...12037-pdt.html
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Old Jul 20, 2012, 05:46 AM   #7
mac jones
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I have two 2.5" USB 3.0 drives and a 3TB 3.5" drive that all work on the Retina. The 2.5" drives I bought as USB 3.0 enclosures and added drives. I've used SSDs and rotating drives with these 2.5" enclosures. I've used a notoriously power hungry WD 7200 Scorpio black 2.5" and it works. This drive has had problems in a few USB 2 enclosures, so I don't know what's going on. Maybe i've been lucky and they will stop working, now that I know they shouldn't work.
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Old Jul 21, 2012, 08:40 PM   #8
fleawannabe
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I went and bought a WD mypassport and it works fine and runs up to 5gb. Thanks. I guess the Toshiba just needs too much power.
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Old Jul 22, 2012, 11:11 AM   #9
fleawannabe
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The USB 3.0 is reading at 68.5 and writing at 45. The USB 2.0 is reading at 37.5 and writing at 33.2,not that much faster. Any ideas? And yes my System Information says up to 5gb/s
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Old Jul 22, 2012, 11:21 AM   #10
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There are two things going on. First is the transport speed of the protocol. USB 3 is much faster that USB 2. But no matter how fast the USB pipe...it will not help if the drive is a slow SATA 3GB running at 5400. So if you use USB 3 and want the max...make sure the drives are SATA 6GB running at 7200.
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Old Jul 22, 2012, 11:23 AM   #11
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There are two things going on. First is the transport speed of the protocol. USB 3 is much faster that USB 2. But no matter how fast the USB pipe...it will not help if the drive is a slow SATA 3GB running at 5400. So if you use USB 3 and want the max...make sure the drives are SATA 6GB running at 7200.
Or ssd
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Old Jul 22, 2012, 02:19 PM   #12
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even better.
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Old Jul 22, 2012, 04:21 PM   #13
hinrgmike
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Picked up one from Other World Computing that works real nice with my rMBP -

http://eshop.macsales.com/shop/firew...W800_FW400_USB

They come in USB 3.0 7200 with 6Gbps. Also they have a "power" plug usb to boost the power to make sure they run properly at full speed. I plug the main usb connector in on one side and the longer "power" usb plug into usb port on other side and it works perfect.
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Old Jul 22, 2012, 04:34 PM   #14
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Have you installed the most recent update? It was supposed to help with USB compatibility.
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