TontNZ

See above "VirtualBox virtual disk" file. Thanks - Peter

I think one file comprised of almost 42,000 fragments qualifies as insane! Certainly enough to affect to noticeably affect performance.

Hi All Defraggler: v2.13.670 (64-bit) OS: Windows 7 (64-bit) SP1 + all system updates RAM: 16GB Hard drive being defragged: 4 x Seagate ST3000DM001 (3TB) in Raid 10 I have a number of large files (VirtualBox virtual disk files) that wont defrag. I've tried doing a quick defrag before doing an Analyze and then picking the file (41,265 fragments) I want defragged. When I try to defrag it at the end I receive the error message: Defrag Aborted. No files were defragmented. This option could not be done. For the drive containging the file to be drefragged, Defraggler is reporting: Used space: 441,834,795,008 bytes (7%) Free space: 5,559,209,689,088 bytes (93%) As you can see from the attached disk map there is an abundance of contiguous free space but the file is never defragged Any ideas please? Thanks for taking the time to read this - Peter