Repairing the disk

Well this is what it said when I clicked Verify Disk in disk utility.




Verifying volume “Macintosh HD”
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Checking multi-linked files.
Checking Catalog hierarchy.
%)
Checking Extended Attributes file.
Checking volume bitmap.
Volume Bit Map needs minor repair
Checking volume information.
Invalid volume free block count
Invalid volume free block count
uld be %@ instead of %@)",2)
988787
988758
The volume Macintosh HD needs to be repaired.

Error: The underlying task reported failure on exit


1 HFS volume checked
Volume needs repair





So i think that the repair process goes as follows:

1. Start up using the original OSX disk that came with my computer.
Hold *Option* while the computer is booting up, right?

2. Open disk utility and click repair disk. (on which one? the one that says "Macintosh HD" or the one that has all the numbers?)



My main questions are:

1. Do i need to back up my computer for disk repairs? (Will it erase my hard drive?)
2. Will this repair have a big (or any) effect on my computer's performance? (Do i even need to do this at all?)

I'm sure you have to hold down the c key on boot up
and yes the Macintosh HD
This will not erase your Hard drive
Yes have a back-up

Anytime you do a disk repair, it is good to have a back up. That is in case some thing disastrous may happen.

Grab a copy of DiskWarrior. It is the best HDD tool.

Ok, so just run me through the process. I think it's:

1. Stick in Mac OS X Install Disk 1 (that came with comp.)
2. Restart computer, holding down the C key when it is booting up.
3. Open disk utility, click verify disk
4. Click repair disk

I already backed up what I need.

Yes that will do it.