2 Files left after erase HD

[tresho]

I erased my HD to reinstall OS X . This is my internal HD ( I do not have external).
System is a OS X 10.4.10 Intel Core 2
I want to erase ALL the data so I can reinstall and sell.
1: put disk in
2: restart Hold C key
3: disk utility
4: select HD
5: Click erase
6: volume format Journaled
7: name (Macintosh HD)
8: zero out data 7pass click ok erase

This should erase my Hd and Partion to new name.
At the end (after 7 hours) it erase all data except for 2 file.
Click onto Macintosh HD it gives me the info at the bottom of the screen.

Capacity 232.6
available 232.5
used 73.3 MB
2 files
2 folders
Is this normal to have 2 files and 2 folders left on HD after erase.
After hours (6 hours) of searching for an answer and talking to the local Apple store I have no answer. No one seems to know.
It's driving me Nuts. I don't mine lossing 73.3 MB, it's just I don't know what the 2 files/ folders are and don't what to leave ANY Data on the Mac except what came with it.

Any help at all PLEASE. PLEASE
THANK YOU

 

[msevild]

When booted from the operating system disc, open up the terminal utility from the menu bar and run the command below and using the quotes put the name of your hard drive in. The quotes need to be there.

1st command: cd /Volumes/"The name of your hard drive here"
2nd command: ls -la

The first command will go to the root level of your hard drive. The second command should show you any hidden files or folders. I'm going to say that there will probably be a couple hidden files there from formatting the drive(Disk utility formats the drive and puts some files on it). No way to get a completely erased hard drive without any files or folders on it. It's probably nothing to worry about and shouldn't contain any data related to the information on the computer prior to the erase.

 

[tresho]

So after I erase the HD if I open Terminal and enter
:cd/volumes/"Macintosh HD"
:ls-la
This will show me what the files are.
(I only have 1 computor so every time I erase I need to install to find answers. I have done this 4 times now).
So I just would like to be clear.

Thank you msevild

 

[sickmacdoc]

Well I don't think I would be too awfully concerned after a 7 pass erase- keep in mind that even on a brand new unused disk there will always be some system level files- the empty disk directory that counts as one comes to mind for instance.

 

[tresho]

I figured it out.
When you erase a disk OS X will zero out the entire disk (everything). When it finish erasing the disk, it formats and names it, that is what the files and folders are.