Some critical, oft-used system files were also significantly fragmented, including the Spotlight database.
IDEFRAG MAC TORRENT MAC OS X
On an in-house Intel-based Mac with ample free disk space running Mac OS X 10.4.8, for instance, we found several large video files were highly fragmented, as were some large applications like the Photoshop CS3 beta. Second, the automatic defragmentation routines will not work on certain files - specifically those above 20 MB nor those fragmented into 8 or fewer segments. First of all, though they can reduce fragmentation of extant files, they can also cause remaining free portions on the disk to become smaller in size, potentially leading to more fragmentation down the road as new files are written.
Finally, Mac OS X 10.3.x can automatically defragment some files through a process called 'Hot-File-Adaptive-Clustering.' Though these routines have undoubtedly have made consequential fragmentation a less common occurence, their efficacy is not beyond question. Second, Mac OS X 10.2 has a routine that clumps smaller portions of disk space into larger portions on the fly. First, the filesystem avoids using space recently freed by recently deleted files whenever possible, looking instead to potentially larger, already free portions of the disk first. Fortunately, Mac OS X's HFS+ filesystem has some safeguards against avoidable fragmentation.
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