Long ago, Gartner concluded and reported that "a multi-pass defragmenter must be run over and over to defragment the disk, especially when defragmenting very large disks with heavy defragmentation and limited free space. As such, multi-pass defragmenters characteristically fragment the remaining free space on the disk, which accelerates fragmentation later.It is recommended that a third-party single-pass defragmentation tool be implemented instead."
This is one reason PerfectDisk employs a single-pass approach. Besides being Microsoft's only certified defragmenter, one of the things that makes PerfectDisk unique is its patented single-pass SMARTPlacement technology and Space Restoration Technology. These technologies not only speed up boot times and future defrag passes, but also consolidate free space into a large contiguous chunk to proactively cut the speed of refragmentation by up to 90%. Multi-pass defraggers, that can't be scheduled, only react to fragmentation in real time by attempting to defrag after fragmentation has already occurred - all while taking up valuable system resources when you need them most.
Despite the findings of the world's leading information technology research and advisory company, some - or actually one - move further and further away from the strategy recommended by Gartner. That one issues press releases that state, for example, "many have discovered that fragmentation continues to build between scheduled runs. These large drives require a more modern approach and specialized solutions for large-capacity drives. Scheduled defragmentation, which leaves fragmentation behind between runs, is outdated; transparent, automatic defragmentation which runs whenever unused resources are available is the order of the day."
Uh...no. If a multi-pass defragger runs over and over and fails to adequately consolidate free space, then yes - fragmentation would build rapidly. But that's why Gartner recommends not doing that!
Uh...no. A specialized solution for large-capacity drives is not modern, but a rip off. That's why, when PerfectDisk was architected to support multi-terabyte drives before any other solution could come close to handling them, we determined that the solution would work for all drives, and there was no need to charge extra for it. So we don't.
The "order of the day" is still single-pass, despite wild and unsubstantiated claims from a lone cry in the wilderness. Clean. Efficient. Fast.