Ian,
Actually, it does matter - as not all defragmenters are created equal
For example - free space consolidation. This is quite important. Not all
defragmenters do an equivalent job of consolidating free space.
Another example is ability to defragment all types of files. O&O Defrag V6
doesn't defragment files with multiple data streams. They show the files as
"locked" and will not defragment - even though Microsoft's defrag APIs fully
support defragment them (and Diskeeper and PerfectDisk are able to
defragment them easily).
- Greg/Raxco Software
Microsoft MVP - Windows File System
Disclaimer: I work for Raxco Software, the maker of PerfectDisk - a
commercial defrag utility, as a systems engineer in the support department.
Want to email me? Delete ntloader.