Lacie external hard drive suddenly won't mount on iMac 27"

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Level 1

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Lacie external hard drive suddenly won't mount on iMac 27"

Help! My back up Lacie suddenly won't mount. It shows up on my disk utility (but faded) and I tried to repair it with no benefit. I thought it might be a Lion problem, but my other Lacie is working fine. I tried using a different USB cable and unplugging everything, rebooting etc. Any help would be much appreciated.

iMac, Mac OS X (10.7)

Posted on Jul 31, 2011 9:22 PM

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Answer 1

rkaufmann87

Level 10

148,624 points

Jul 31, 2011 10:36 PM in response to etslee

There may be hardware problem with the drive. However you can try resetting the SMC. Don't be afraid to reset it 2-3x if the first time doesn't work.

SMC RESET

Shut down the computer.
Unplug the computer's power cord and all peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.

PRAM RESET

Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

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Answer 2

etslee Author

Level 1

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Aug 1, 2011 2:21 PM in response to rkaufmann87

Thanks for responding. I tried SMC reset with no luck. However, after looking at this thread about Lacie power supply problems, I'm going to try and get a new power supply before using something like Diskwarrior.

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