My 2010 cannot see the external HD anymore.

Hi,
I bought a new LaCie 1TB and hooked it up to my 2010 MBP. Launched the setup assistant and formatted the drive. The format crashed and I was told to check my usb cable. Since then, I have not been able to see the drive. I can connect other USB devices without problem. I have tried all three USB ports. The external drive is recognized by all of the other macs that we own. I have zapped the PRAM a few times.
Following the original crash, the drive was successfully formatted from a different mac.
Any suggestion will be appreciated.

Is this a "bus powered" drive or does it have its own separate power supply, Touched?
Does it have a firewire interface as well as USB?
Given that you say the USB ports are working with other devices, and the drive works with other computers, the most likely explanation sounds like inadequate power supply when connected to the MBP.
If you have a firewire option on the drive, then try that instead. (Firewire provides much more reliable power supply to eternal drives than USB and is faster as well). If you don't have firewire, and the drive is bus powered, use a "Y" cable to connect it to two USB ports rather than just one, or attach an independent power supply.
Cheers
Rod

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