Macbook Pro HDD Question S.M.A.R.T

Hi,

I recently bought TechTool Pro 6 and ran a scan on my MacBook as it has become very slow and non responsive. I have wiped the drive (zeroing it out) and reinstalled OSX Mountain Lion on it.

TechTools susgets that thre is an issue with "Current Pending Sector Count"

Defined as:

Current Pending Sector Count S.M.A.R.T. parameter is a critical parameter and indicates the current count of unstable sectors (waiting for remapping). The raw value of this attribute indicates the total number of sectors waiting for remapping. Later, when some of these sectors are read successfully, the value is decreased. If errors still occur when reading some sector, the hard drive will try to restore the data, transfer it to the reserved disk area (spare area) and mark this sector as remapped.

I ran a full Sector check on the drive that took 5 hours. There where no bad sectors found.

Does this mean that there is nothing worng with the HDD? Is there a way to Low Level Format the drive? Is there a ChkDsk option avaliable in OSX?

Thanks