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LaCie external drive won't mount

Posted on 2013-06-02
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Last Modified: 2013-07-07
I'm trying to attach a 4 LaCie Quadra d2 hard drive on a laptop. The drive shows up under devices but does not mount as a drive in Windows 7. I've never seen this happen before.

What would prevent a drive from mounting?
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Question by:sthon
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9 Comments
 
LVL 8

Expert Comment

by:TMekeel
ID: 39215282
Is it the correct file structure?
Most people I know with Lacie drives are Mac users.  

If it's HFS+ it wont mount (if I remember correctly.)
Click start, type compmgmt.msc in the search box and hit enter.
Go to drive management and see if it's there.
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Author Comment

by:sthon
ID: 39215311
No, it's not there. Is there a way to reformat it for Windows when it doesn't show up in disk management?
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LVL 92

Expert Comment

by:nobus
ID: 39215431
look in disk management and assign a drive letter
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LVL 47

Expert Comment

by:noxcho
ID: 39215975
Take a screen shot of Windows Disk Management and post it here.
There are two possible causes:
1)The drive is formatted in non-Windows format.
2)The drive is Windows formatted but it does not mount automatically. In this case you need to enable in Registry - AutoMount. It is normally written NoAutomount with value -0. Sometimes it changes to 1 and then it will not mount automatically.
In HKLM\SYSTEM\Controlset001\Services\Mountmgr
And finally there is a third possible cause - the drive becomes not enough power and thus cannot be used by Disk Management.
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LVL 92

Expert Comment

by:nobus
ID: 39216293
yes - that's why i always suggest using external drives with their own power supply, or lacking that - to use a POWERED USB hub like  :  http://www.belkin.com/IWCatProductPage.process?Product_Id=158910
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Accepted Solution

by:
sthon earned 0 total points
ID: 39293733
The drive was unformatted.  I found the drive in devices and formatted it. A dumb mistake. Thank you all for your input.
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LVL 47

Expert Comment

by:noxcho
ID: 39294871
Unformatted means that it has only unallocated space or it was still in some kind of for at which Windows detected as unformatted?
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Author Closing Comment

by:sthon
ID: 39305075
It was an obvious solution that I missed initially. I looked for complexity when simplicity was the answer.
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