Дефрагментатор

SMARTPlacement
This is the default defragmentation algorithm for entire drive defragmentation in PerfectDisk. SMARTPlacement not only defragments files and consolidates free space, it also optimizes file placement based on file age and most recent time of access. PerfectDisk treats files created or accessed in the last thirty days as Recently Modified; they receive preferential placement on the disk. PerfectDisk treats files created or accessed in the last 31 to 60 days as Occasionally Modified, and places them next to Recently Modified files (but closer to the outside edge of the physical disk where access times begin to increase). Finally, PerfectDisk treats files created or accessed more than 60 days ago as Rarely Modified and places them next to Occasionally Modified ones, but even closer to the outside edge. Boot files go all the way to that edge, where they are easy to locate during boot time (and unused thereafter). SMARTPlacement will optimally place Metadata and MFT files for best Windows performance as well. This is the default setting for PerfectDisk because it produces disk organizations that are least likely to fragment going forward, and is what most users should choose when defragmenting a disk.

Consolidate Free Space
When it defragments a drive using SMARTPlacement, PerfectDisk emphasizes optimal file placement and speed of overall completion above creating the largest possible extents of free space on any hard disk it defragments. When you select the Consolidate Free Space option, the software will seek to create the largest possible extents of free space, and does not optimize file placement. This process can involve moving large files to reclaim relatively small amounts of free space (a maneuver that PerfectDisk omits when using SMARTPlacement by itself), and explains why this mode sometimes takes longer to complete. Free space consolidation is best for shrinking or growing disk partitions, when seeking to resize virtual machines, or to provide a boost to lagging Windows performance when PerfectDisk itself recommends running this defragmentation algorithm.

Defrag Only
As the description hints, this is a quick and dirty method of defragmentation. It neither optimizes file placement nor seeks to consolidate free space, but simply defragments any fragmented files it finds as quickly as possible. This method will probably increase the number of free space fragments on a drive, but is not particularly thorough or optimal. It is the fastest form of entire drive defragmentation; use it primarily as a convenience between regularly scheduled SMARTPlacement defragmentation jobs.

STEALTH Method
Die The STEALTH method is based on our unique STEALTH technology and allows an unprecedented level of defragmentation on computers having a large number of files, little free space or available main memory.

This method defragments all fragmented files and tries to consolidate them in order to optimize available free disk space. Speed and resource usage are the main considerations here and the method is therefore not quite as thorough as the SPACE and COMPLETE methods.

SPACE Method
All fragmented files will be defragmented, and then placed into the free slots in which they fit. This maximizes contiguous free space. This method is very quick and efficient and it does reorganize your volume, but not as thoroughly as the COMPLETE methods.

Further defragmentation will not be affected by the SPACE method. The SPACE method is ideal for the first defragmentation run on a system that has never been defragmented, as it requires far less free space than the COMPLETE methods.

COMPLETE/Access Method
Files are sorted according to when they were last accessed. The files that have been accessed the least will be placed at the beginning of the partition and those accessed most frequently are put near the end. Seldom-used files are defragmented and will not need to be moved in future. Frequently-used files are placed at the end of the drive. This strategy means that future defragmentation runs will require the least amount of time, as fewer files need to be checked and defragmented.

COMPLETE/Modified Method
Files are sorted according to the date on which they were last changed. The files which have not been changed recently are placed at the beginning of the partition and those recently changed are placed at the end. This option is a good one for file or database servers containing files that have never been changed (e.g. system files), but where others, on account of their size or content, are frequently modified. (e.g., database files)

This strategy means that future defragmentation will require the least amount of time, as only a few files need to be checked and defragmented.

COMPLETE/Name Method
Files are sorted alphabetically from the beginning to the end of the partition and this leads to quick access to files in a directory. When Windows starts up, many system files will be read in sequence from the \WINDOWS and the \WINDOWS\system32 directories (DLLs, system drives, etc.) and the start-up time will therefore be shorter.

This method is particularly recommended for computers on which the files rarely change. This reduces the reorganization time that is needed for every defragmentation.