Application to scan and repair hard drive corruption?

Hi, my 2nd internal drive ran out of space and I'm afraid that there was hard drive corruption. Some of the video icon's weren't showing up and when I click on the video to play I kept getting beach balls. it seems to be better now but is there an application that can detect if there's any hard drive corruption? thanks

Stuart Lawrence wrote:
The hard drive seems to be ok now. I have 90gb's of free space on it. What do you think happened to it?
I couldn't say. But 90GBs should be plenty of free space to work with.
You might launch Disk Utility and check something though:
You will notice that the drive appears twice int he sidebar of Disk Utility.
The upper listing is the physical drive itself and it's controller. Highlight it and note what is reported at the bottom of the window beside "Partition Map Scheme". If this drive is only going to be used on your Mac, then it should read "GUID Partition Table"
Now highlight the lower listing in the sidebar. This is the portion of the disk platter devoted to storing your data. What is reported at the bottom of the window beside "Format"? It should read "Mac OS Extended (Journaled)".

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