Disk defragmentation do?
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Experts answer: peep from the nine aspects of defragmentation ========================================= ======== I. What is disk fragmentation? In fact, disk fragmentation should be referred to as file fragmentation, because the file is divided Save to disk scattered in different parts of the whole, rather than continuously stored in contiguous disk clusters formed. [BlockedAds] When the application of physical memory required, the general operating system Zaiyingpanzhong produce Linshijiaohuan Wen Jian, with Gai Wenjian occupied by the hard disk Kongjianxuni into Neicun. The hard disk virtual memory manager will frequently read and write, produce large amounts of debris, hard disk fragmentation is the main produce. Other information, such as IE browser or when the temporary files generated temporary file directory settings will cause the system to form a large number of fragments. File fragments not normally cause problems in the system , But the file system will fragment over time in reading the file back and forth to find, cause system performance degradation, but also shorten the drive life seriously. Also, excessive disk fragmentation may also lead to the loss of stored files. =============================== ================== Second, how disk fragmentation is produced? Disk partition, the file will be saved to disk scattered in different places, rather than continuously saved to disk consecutive clusters. Also during the operation because the file, Windows system may be called virtual Memory to synchronize the management process, it leads to frequent the various procedures on the hard disk read and write to disk fragmentation. ================================================= 3 , the disk read and write operation principle know Disk fragmentation causes, we also need to know to run when the disk reads and writes. Generally run a program, disk drive heads work is to first search the necessary files to run the program, and then read the data, and finally make reading treatment - high-speed data transfer to disk slow Deposit (Cache) and memory. Search time performance in the hard disk is called the average seek time (Averageseektime), in milliseconds (ms), the current mainstream hard disk average seek time less than 9.5ms. If the application documents can put the disk Continuous space, the head will reduce a lot of time searching. The same is true when reading the disk to read the data in the head below the sector time to head to another location only to read the same data time and then one-fifth. Read the disks, the system first checks whether the data in the cache, if there is Direct reading; If not then access the disk, that is, read the disks. When you need to repeatedly read the same data, Cache big role, but for the first time to read a file, Cache can not do anything. So the search time and reading time is largely affected the efficiency of program execution. To How to order the disk and the Windows system does not automatically each file to minimize head in accordance with the principles of search time on the disk into the most appropriate location. So Microsoft in Windows to add the "DiskDefragment" (Disk Defragmenter Procedures), and provides "TaskMonitor" (Task Monitor) to track the program starts the process of disk activity, in order to facilitate "DiskDefragment" to work more effectively. "TaskMonitor" is automatically shipped with the Windows Start Line (of course, in the "Start" select "TaskMonitor"). When loading an application program when it access the disk by monitoring the movement Lailejiegai Chengxuqidong called when the search and the document, Suoxu file for Ding Wei, Bing Jiang Jie Guo watch store in the "C: * Windows * Applog "hidden directory. This directory most of the documents". Lgx "for the extension, which" lg "on behalf of record file (LogFile)," x "said the letter, such as the D drive program on to". Lgd "extension; record file name TaskMo nitor by monitoring the application filename, such as the E drive on the WinZip program recorded as "Winzip32.lge". Defrag users, the program Applog directory under the application of information to the relevant file to disk continuous space
Experts answer: peep from the nine aspects of defragmentation ========================================= ======== I. What is disk fragmentation? In fact, disk fragmentation should be referred to as file fragmentation, because the file is divided Save to disk scattered in different parts of the whole, rather than continuously stored in contiguous disk clusters formed. [BlockedAds] When the application of physical memory required, the general operating system Zaiyingpanzhong produce Linshijiaohuan Wen Jian, with Gai Wenjian occupied by the hard disk Kongjianxuni into Neicun. The hard disk virtual memory manager will frequently read and write, produce large amounts of debris, hard disk fragmentation is the main produce. Other information, such as IE browser or when the temporary files generated temporary file directory settings will cause the system to form a large number of fragments. File fragments not normally cause problems in the system , But the file system will fragment over time in reading the file back and forth to find, cause system performance degradation, but also shorten the drive life seriously. Also, excessive disk fragmentation may also lead to the loss of stored files. =============================== ================== Second, how disk fragmentation is produced? Disk partition, the file will be saved to disk scattered in different places, rather than continuously saved to disk consecutive clusters. Also during the operation because the file, Windows system may be called virtual Memory to synchronize the management process, it leads to frequent the various procedures on the hard disk read and write to disk fragmentation. ================================================= 3 , the disk read and write operation principle know Disk fragmentation causes, we also need to know to run when the disk reads and writes. Generally run a program, disk drive heads work is to first search the necessary files to run the program, and then read the data, and finally make reading treatment - high-speed data transfer to disk slow Deposit (Cache) and memory. Search time performance in the hard disk is called the average seek time (Averageseektime), in milliseconds (ms), the current mainstream hard disk average seek time less than 9.5ms. If the application documents can put the disk Continuous space, the head will reduce a lot of time searching. The same is true when reading the disk to read the data in the head below the sector time to head to another location only to read the same data time and then one-fifth. Read the disks, the system first checks whether the data in the cache, if there is Direct reading; If not then access the disk, that is, read the disks. When you need to repeatedly read the same data, Cache big role, but for the first time to read a file, Cache can not do anything. So the search time and reading time is largely affected the efficiency of program execution. To How to order the disk and the Windows system does not automatically each file to minimize head in accordance with the principles of search time on the disk into the most appropriate location. So Microsoft in Windows to add the "DiskDefragment" (Disk Defragmenter Procedures), and provides "TaskMonitor" (Task Monitor) to track the program starts the process of disk activity, in order to facilitate "DiskDefragment" to work more effectively. "TaskMonitor" is automatically shipped with the Windows Start Line (of course, in the "Start" select "TaskMonitor"). When loading an application program when it access the disk by monitoring the movement Lailejiegai Chengxuqidong called when the search and the document, Suoxu file for Ding Wei, Bing Jiang Jie Guo watch store in the "C: * Windows * Applog "hidden directory. This directory most of the documents". Lgx "for the extension, which" lg "on behalf of record file (LogFile)," x "said the letter, such as the D drive program on to". Lgd "extension; record file name TaskMo nitor by monitoring the application filename, such as the E drive on the WinZip program recorded as "Winzip32.lge". Defrag users, the program Applog directory under the application of information to the relevant file to disk continuous space
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