- Lots of fragments are slowing down your systems performance (especially true for any Windows systems).
- You may want to shrink a partition and therefore need to move all files to get all available space at the end of the partition.
Why?
Because NTFS uses a MFT table for allocating, which could be anywhere and unfortunately, it will be in most cases at the end of the partition.
And almost any defragmentation program is able to move it.
Since I found Perfect Disk. It is not free-ware, but its one month evaluation was enough to finally claim all free space to the end of the partition and get it shrunk with GParted.
Until then, I tested several programs (because Windows XP internal tool isn't the optimum), and I'll list them here.
Perfect Disk
Perfect Disk is simply perfect. It makes it job as one thinks it should. Can defrag your MFT, pagefile, hyberfile in offline mode, its defragmentation algorithms seem to be very clever, can choose each algorithm automatically adapted to the file-systems state, scheduled tasks, during screensaver, and the interface is clean and nice.
O&O Defrag
O&O Defrag is similar to Perfect Disk, but finally wasn't able to move the MFT, but has more algorithms than Perfect Disk. It seems to be more slower during defragmentation than the other one. Isn't free-ware too.
MyDefrag
MyDefrag is freeware, and has a very different concept to other tools. Internally, it uses scripts that define the algorithm, and even if there are several ones included already, you could write your own ones. Its interface is ugly, but includes screensaver mode. Can handle floppies, USB disks, memory sticks, and anything else that looks like a disk to Windows.
Auslogic Disk Defrag
Auslogic tools is a simple disk defrag tool, with a nice interface. Does its job better than Windows included one and is free-ware too. Can defrag a single file or folder and includes a scheduler.
Defraggler
Use Defraggler to defrag your entire hard drive, or individual files - unique in the industry. This compact and portable Windows application supports NTFS and FAT32 file systems. Lets you specify one or more files, folders, or the whole drive to defragment. Very simple and supports quick defrag.
WinContig
WinContig is an easy-to-use stand-alone defragmentation tool that doesn't create any installation directories or Registry entries on your computer. Its purpose is to quick defrag files without the need to defrag the whole disk. In addition, WinContig allows you to group files into profiles, and also it accepts a number of optional command-line switches that you can use to control how the program operates.
SysInternal Tools
SysInternals also has some tools for defragmentation working directly on single files which can help out in some cases.
Contig
Contig is a single-file defragmenter that attempts to make files contiguous on disk. Its perfect for quickly optimizing files that are continuously becoming fragmented, or that you want to ensure are in as few fragments as possible.
PageDefrag
PageDefrag uses advanced techniques to provide you what commercial defragmenters cannot: the ability for you to see how fragmented your paging files and Registry hives are, and to defragment them. In addition, it defragments event log files and Windows 2000/XP hibernation files (where system memory is saved when you hibernate a laptop).
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