Can Time Machine reset?

I switched my WD external drive from direct usb to my mac to my airport extreme so I could share the drive across my network. Now I get an error saying there is not enough space for Time Machine to perform a backup. Can I erase some of the drives contents to make room? I don't think I'd have a problem erasing the whole drive and starting over. Thanks!

Kappy wrote:
I don't wish to get into a p*ing battle over this,
me neither which is why I mostly don't say anything when I see you you recommend it.
but that command may in fact be necessary as it was on my AEBS and numerous others. And, I have suggested this in the past to others who found it did enable them to use their AEBSes with TM.
well, my point is that I've seen MANY posts (including some very recent ones) by people who've been using TM with AEBS successfully. Not having an AEBS myself that's all I can go on. It's my understanding that's all this command does is make local network drives available as TM drives in TM system preferences. again, those posts were by people who didn't have to run that command to make an airdisk available as a TM option even though they may have later ran into other issues, different than the issue of just being able to back up to an airdisk.
just see this post from earlier today (to which you also contributed btw).
http://discussions.apple.com/message.jspa?messageID=8479287#8479287
the guy has been using an airdisk with TM for a few months without any issues without that terminal command. he ran into some problems now but that doesn't take away the fact that it worked perfectly fine for a few months, long after Time Capsule has been introduced.

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