External Harddisk dont work from one to the other day

Dear all
i dont really know where to post this topic, i also dont know where the problem is, maybe some helpful tips would help.
I purchased with my new MBA an external hd, the lacie P9223, as expected i just plugged in to the usb port and all worked fine, i loaded all my music, fotos vids etc on the external drive, worked for several weeks without any issue, then today i plugged in the lacie again and the volume was not showed, the strange is in "about this mac" in the register Harddisks is not shown but in the system protocoll its in. i tried to download the mac driver from the lacie homepage, without any result, all other "toys" i plug into the usb are working fine.
i guess its lacie's problem, right? did anybody had a simmilar issue that a working external hd after a while did not worked anymore, without any updated or something else?
if somebody can advise me i would be very thankful

Hello mic1978
Check in disk utility to see if it shows up there. If it does, then you would have the option to repair the disk if it has an issue with showing up on you MacBook Air.
Disk Utility 12.x: Repair a non-startup disk
http://support.apple.com/kb/PH5863
Thanks for using Apple Support Communities.
Regards,
-Norm G.

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External Harddisk dont work from one to the other day

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