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Old Mar 13, 2011, 10:40 AM   #1
sbb155
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is 11" USB port powered?

None of my external drives will show up when plugged into my 11" air. They spin, but dont come up
Is it a power issue? Or is this normal?
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Old Mar 13, 2011, 10:42 AM   #2
Charlie Sheen
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my 11" macbook air is able to power an external optical drive without power suply and the disk shows up as normal.try mounting the via the terminal
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Old Mar 13, 2011, 10:51 AM   #3
sbb155
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hmmmm
my western digital drive shows, but not seagate x2
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Old Mar 13, 2011, 10:53 AM   #4
Charlie Sheen
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hmmmm
my western digital drive shows, but not seagate x2
does the other drive require an external power supply?
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Old Mar 13, 2011, 11:00 AM   #5
sbb155
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nope none do on my MBP 15".... is this some problem?
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Old Mar 13, 2011, 11:11 AM   #6
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My Seagate works on my MBA 13" with or without power cord.
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Old Mar 13, 2011, 11:22 AM   #7
Charlie Sheen
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weird it should at least show up. i'd say you mount it in the terminal if nothing happens then it may be a disk failure. but of course if it works on other machines with windows or linux on them then it truly is a weird issue.

edit: did you try both ports? and did you try to plug it in with the mba charging?
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Old Mar 13, 2011, 11:42 AM   #8
sbb155
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both times the drive was plugged into a MBA that was charging
tried both ports
how do i mount with terminal?
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Old Mar 13, 2011, 11:48 AM   #9
Charlie Sheen
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Ok so my linux use has apearently spoiled me. You should see the disk in disk utilities if not then i think you should try it with a different computer. Ask you friend or something.
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Old Mar 13, 2011, 01:06 PM   #10
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I think all USB ports on all PC's or Mac's are bus powered. Problem is that some external devices need more power than the USB can deliver and consequently do not work.
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Old Mar 13, 2011, 01:08 PM   #11
sbb155
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Yes, but the drives work in my MBP... so I am wondering if anyone else had this problem
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Old Mar 13, 2011, 02:10 PM   #12
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Yes, but the drives work in my MBP... so I am wondering if anyone else had this problem
Have you tried it on BOTH of your MBA USB Potts? I think that only one of them is capable of supplying power to an external device.

EDIT: At least that is what I've seen on my 11.6" MBA.
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Old Mar 13, 2011, 02:39 PM   #13
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yes I have tried both! Of course!!!!
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Old Mar 13, 2011, 03:19 PM   #14
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go to your finder preferences and check the box so that hard drives show up, that could be a fix, maybe?
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