Should I format the Time Machine HD before using it on new i7?

I have been using the external HD on my G5. Now that I am moving to the new iMac 27", should I format the HD and start with a clean drive for the new Mac?
If so, does it make any difference if the HD is formatted on the Mac or a PC?
Thanks
Message was edited by: Herschel Hochman

Herschel Hochman wrote:
I have been using the external HD on my G5. Now that I am moving to the new iMac 27", should I format the HD and start with a clean drive for the new Mac?
Your choice -- that's optional, not necessary. If you don't, when you do your first backup, you'll get a prompt allowing you to either start new backups or continue using the old ones. See #B5 in the Time Machine - Troubleshooting *User Tip,* also at the top of the +Time Machine+ forum.
If so, does it make any difference if the HD is formatted on the Mac or a PC?
Yes. Do it on a Mac. See #5 in the FAQ Tip for details.

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