MacBook Pro "Core 2 Duo" 2.16 15 2006-7 OS X 10.6.8 I recently put some stuff in the trash and started to empty it, when I realized there shouldn't have been that many files in the trash and stopped it; but some stuff got zapped. After some research, I downloaded Data Rescue 3 onto an external drive, and ran it from there without installing. I had about 20 gigs of free space on the HD and I went ahead and recovered most of it to the external drive, to go through later when I have the time. I didn't lose anything really critical, and I have backups of most of it, so going through all those files can wait. But in the process of reviewing what was found in the empty space on my drive, I realized there was a lot of stuff in the HD free space that did NOT need to be there, stuff that I had deleted, including financial and other sensitive data, but was still recoverable. So I did some housekeeping, removed some large files on the HD to make more space, emptied the trash, and then did a Disk Util. 7-Pass Erase of Free Space. I now have 47 gigs out of 119 free: I then did another DR3 "Deleted Files Scan", but the results showed up as follows: After Disk Util. "7-Pass Erase of Deleted Files": 6,102 files recovered from HD by DS3. A tech at DS3 said this was an abnormal recovery from zeroed-out free space on my HD, and could not offer any DS3 explanation for this result, and suggested I try the "Zero Out" option, which I did, but the results were pretty much the same again: After Disk Util. "Zero out Deleted Files": 6,075 files recovered from HD by DS3. Questions: 1) Anyone have an explanation for this? 2) Is a restart required after using DU to free space? 3) Are there any known issues/bugs with using Disk Util. to clear free space, where the deleted files are not successfully written over? 4) Is there any way, using the OS X system (or some other method that does not require buying more utility software), that I can confirm the results of the DS3 scan? 5) If there is, and I confirm that I still have 6,000 undeleted files, what then?? I'm not ready to migrate to Lion yettoo many outstanding issuesbut open to whatever you can otherwise suggest. Thanks much.