On a hard disk, a cluster is the smallest unit of disk space, and is the smallest unit that the operating system can address, and it is also the smallest footprint of a file. In Windows XP, the standard hard disk formatted with the NTFS file system, the maximum default value of the cluster is 4KB (that is, 4096 bytes). Now, every time you copy a new file to the hard disk, or delete the old file once every time from the hard disk, and every time you add content to an existing file, you will continue to create more disk fragments for each operation. For example, when copying a file to a hard disk, the operating system stores the file in the first free cluster on the hard disk. If the first cluster cannot completely store the entire contents of the file, the operating system divides the file into several parts. After filling the first cluster, the remaining parts are placed in the next free cluster. If this second free cluster is not exactly after the first one, then the file is artificially split into several pieces.
When adding information to a file, fragments are often generated together. If the original file exceeds the size of the original cluster because of the addition, the operating system will have to fill the excess to the next free cluster. If this free cluster happens to be behind the original cluster, then the file is once again fragmented. In addition, deleting files from the hard disk each time will cause a large number of clusters to be re-used, and these originally discontinuous clusters greatly increase the possibility of new files being fragmented - unless the deleted files have been cleaned beforehand. File fragmentation. The longer the time, the greater the problem of ignoring file fragmentation. The spread of file fragmentation forces the hard disk to read and write more frequently. Positioning and reading data, the more times the read and write moves, the longer it takes to read the file, and the harder the performance of the hard disk. Sometimes things get worse, file fragmentation can cause a big downside in overall performance, extended boot times, randomly generated system crashes, and unexplained system crashes. In fact, a hard disk with extremely severe fragmentation problems may even appear that the system cannot start normally.
The most common disk defragmentation program currently licensed by Execuitive Software, included in Windows 2000 and Windows XP, is designed to organize hard drives and file The content fragments are collected together and stored in a contiguous cluster at the beginning of the hard disk. During this process, disk defragmentation moves all available clusters toward the end of the disk. Once disk fragmentation is complete, all file contents are stored in consecutive clusters. When files are accessed, the distance between read and write moves is greatly reduced, and disk performance is improved.
Although defragmentation does improve performance, you have to do it manually - you have to think about it every time you run it. Of course, one obvious solution is to use the scheduler to schedule the disk cleaner to run automatically. However, Disk Defragmenter is not designed to be executed automatically. In fact, this disk defragmentation program is a performance-reducing Diskeeper software. The functions that are automatically executed according to the schedule are not included in this version. If you want to use this function, you can only purchase the full version of Diskeeper software, which provides intelligence. Schedule technology, you can develop a fully automated defragmentation plan based on the habit of using your hard drive.
In Windows Vista, Microsoft finally added the feature of automatic defragmentation. In fact, Disk Defragmenter can be set to clean the hard disk once a day. When I installed the 5308 version of Windows Vista for the first time, I didn't know about this feature. I heard the noise from the hard disk. Just like the operating system that I used to hear in the era of Windows 3.X tried to arrange SWAP files. The line is the same as it was when it was first logged out in the Beta software. After noticing that he continued to spawn during the regular period, open the Task Manager and found that the Disk Debris Cleaner is running in the background. There are no icons or interface instructions telling you that this program is running. But when I found its icon in the start menu and ran it. Through the graphical interface, I found that the disk fragmentation program is indeed running. The schedule is discharged. In the current window, if you click the button of “Adjust Arrangement”, you can rearrange the schedule according to your preferences.
Vista Disk Debris Cleaner
By default, the Disk Debris Cleaner is set to automatically clean the hard drive. By properly setting the run time of the Disk Cleaner, you can improve system performance because it means that the hard drive will never significantly degrade system performance due to too much fragmentation. Seeing this feature, along with other performance enhancements such as ReadyBoost, ReadyDrive, SuperFetch, etc., it can be seen that Microsoft is really trying to add more benefits to Windows Vista and trying to get the best user experience, although enhanced Sex brings a heavy burden, and the huge demand for energy from the operating system is also flattering.
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