Disk error ?

Hi there

I downloades Bootcamp and did everything accoring to the howto until i came to an error that said i should run disk utility and validate my disk ok don

I get this

Code:

Volume Header needs minor repair
The volume rvpete needs to be repaired.

Error: The underlying task reported failure on exit


Disk Utility stopped verifying “rvpete” because the following error was encountered:

The underlying task reported failure on exit
1 HFS volume checked
	Volume needs repair

How do I repair my installation? someohow I dont know how to boot from CD

also will all data be lost, i lack space for backing up atm >_< (about 130 Gigs that still need to be backuped .. and i certainly donw want to rip all my cds again <.<)

how do errors like this happen?
maybe i should mention i have strange problems (like crashing safari and so on) since we had a power outage due some stupid guys drilling onto the powerline outside .. and a second time due a storm taking out the power for the half of my district (both times the mac was switched on .. and i think some torrents running)

pls help me, because it will cost me a lot of time to backup everything (already backed up 150 gigs now ou of ext hdd space)

 

thank you ^^

now my system runs errorless <3 .. and i think is a bit faster .. but that also could be my imagination cus lack of sleep