how to mount external HD on OSX

How to mount 2 HD on OSX ?I have an external LACie Porsche design USB2-FIRE1394  HD.
Don't know OSX good enough to get it work.Please help
goodearthlightingAsked:
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weedConnect With a Mentor Commented:
How did it not work? You chose Erase, and set the format to HFS+...How'd it go wrong?
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weedCommented:
Just plug it in. It should mount up automatically. If not, open your Disk Utility, and format it to something usable like HFS+.
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goodearthlightingAuthor Commented:
It didn't work.
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weedCommented:
What didn't work? Which step?
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goodearthlightingAuthor Commented:
Formating the hard drive to HFS+ didn't work
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EyeInHandCommented:
We have several of those drives. If you are connecting it with USB, try using Firewire. Some USB ports don't supply enough power to run the drives - the lights come on but they won't spin up and mount. If you have the AC power adapter for the drives, using it will take the electrical drain out of the equation. If you have to use USB, connect the drive using one of the ports on the CPU, not the ones on the keyboard or monitor, etc.

Though it is supposed to mount without restarting the mac, try a restart after you've connected everything. Every now and then a disk won't mount because the driver doesn't load for some reason - a restart with the drive connected seems to force the driver to load.
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goodearthlightingAuthor Commented:
I have mounted the HDD by using Firewire and following Weed's instructions.
So all points should go to Weed.
thanks a lot.
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