Causes and solutions of hard disk space loss Large-capacity hard disks are increasingly welcomed by users because of their good cost performance. When installing or upgrading computer hard disks, many users turn their attention to large-capacity hard disks. Some users find that the hard disk does not match the actual nominal capacity after purchasing, or some users will find that their hard disk capacity becomes smaller after using it for a period of time. So, in view of these problems, let's talk about hard disk capacity. First of all, we should correctly understand the problem of hard disk capacity. Always pay attention to hard disk reports, and users with a little knowledge of hard disks will know that the actual capacity of hard disks is generally less than their nominal capacity. The main reason for this situation is that, in most cases, our definition of hard disk capacity is 1g = 1024m, and most BIOS design and test software of motherboards also calculate the hard disk capacity in1024kbyte, while manufacturers often calculate it in1000kbyte per megabyte for the convenience of calculation and production. Hard disk capacity can be divided into physical disk capacity calculated purely by physical parameters such as the number of heads and columns, and logical disk capacity of actual available space after partition and formatting operations. In addition, selecting different working modes (NORMA, LBA, LARGE) in CMOS will also cause inconsistent capacity. Due to these factors, it is generally normal that there is a gap of about 5%- 10% between the test capacity and the nominal capacity of the hard disk. Hard disk capacity is related to three hard disk modes of motherboard CMOS: normal, LBA and large. To put it simply, the earliest BIOS only supports hard disks with a capacity not exceeding 528M, and the C/H/S parameters in the BIOS are exactly the same as the actual hard disks, so the hard disk mode is normal. Later, in order to solve the limitation of 528M, a large mode appeared, which doubled the capacity supported by BIOS by increasing the number of logical cylinders, but this was an excessive mode. With the popularization of large-capacity hard disk, in the current CMOS hard disk mode, only LBA has practical significance, while NORMAL and LARGE can't recognize and use large-capacity hard disk normally. After understanding the above truth, it seems that we no longer need to pay attention to the problem of hard disk space loss. In fact, in many cases, the hard disk will also lose space because of different programs. Such as bad hard disk, hiding junk files and so on. There are many reasons for the loss of hard disk space, such as misoperation, abnormal program exit, abnormal shutdown, virus infection, wrong program operation or unreasonable hardware partition. Then let's simply analyze the loss and waste of hard disk space in several cases. 1, hard disk bad track is the most serious cause of hard disk space loss. Hard disk bad track should be repaired or shielded in various ways in time, because serious hard disk bad track is physical damage of hard disk, which is accompanied by infectivity. If it is not repaired and treated in time, the bad track will grow bigger and bigger until the whole hard disk is damaged. Once the hard disk has a bad track, you must remember to back up important file data in time, and don't put it on this hard disk. You should replace other hard disks in time for backup or burn them into disks. Because once the hard disk has a bad track, it means that the life of this hard disk will not be too long. Even if it is repaired by software, there is serious danger. I believe that the important data on the hard disk is more valuable than the hard disk itself. 2. Whether the logical partition of hard disk caused by excessive partition is reasonable is not only related to the classified management of hard disk files, but also directly related to the full utilization of hard disk space. We know that files are stored in clusters, that is, a file occupies one or more clusters, and a cluster consists of one or more sectors. If only one byte of a cluster is occupied by one file, the rest of the cluster can't be used by other files even if it is free, which wastes space. It can be seen that whether the partition size of hard disk is reasonable is directly related to the use of hard disk space. Take the current 80GB hard disk as an example. We should divide logical disks as much as possible, such as 20GB and 30GB, and it is recommended not to exceed 40GB. However, the smaller the partition, the better. For example, for 80GB, it is no longer recommended to partition in the unit of 10GB, because too many partitions will not only affect the running speed of the whole system, but also be extremely inconvenient for our management and use. For example, a 160GB hard disk can be partitioned reasonably according to our actual needs. Generally, 40GB is enough, and it is best not to exceed 60GB. 3. Temporary files The waste of hard disk space caused by temporary files is also an easily overlooked problem. When we use the computer, sometimes there will be an error when running the application instead of quitting normally, or the computer will suddenly shut down. , which will make many files. The TMP type continues to be stored in the hard disk. When running an application in the Windows window environment, a file starting with ~ ~GRB will be automatically generated to store the screen information. In addition, there is a win386.swp, which is used to exchange files temporarily in Windows itself. The application will delete these files before the program exits normally, but it cannot be deleted when the application exits normally. These files can be cleaned regularly. The cleaning method is very simple. Give a brief introduction. Select the drive letter to be cleaned, such as the "C" drive, right-click the drive letter, select "Properties", then select the "Disk Cleaning" option under "General", click the "Disk Cleaning" window, and also select "Disk Cleaning". Then we can see several options for us to choose from. Click the space in front to select it, and then click OK. If you want to do something else, 4. The lost file allocation table (FAT) of a cluster is an implicit table on a floppy disk or hard disk. FAT records how files are stored in a specific (not necessarily contiguous) cluster. The file allocation table tracks data in a simple way. In FAT, the entry of the first cluster is the address of the second cluster for storing files. The entry in the second cluster is the address of the third cluster, and so on until the last cluster entry contains the end of file code. Obviously, if the FAT table data is destroyed for some reason, the logical continuity of hard disk data will be disrupted, and the problem of hard disk space loss will occur. This kind of space loss fault can be solved by ordinary disk repair tools, but the data cannot be repaired. Due to the defects of the traditional FAT format, if a cluster does not appear in any file allocation chain and is marked as non-zero in the corresponding file allocation table, then the cluster is neither used by any file nor used by other files, thus the phenomenon of "cluster loss" appears. The loss of clusters will inevitably lead to the loss of hard disk space. This phenomenon of "losing space" is usually caused by abnormal termination of running programs and abnormal shutdown in Win98 environment. Therefore, to sum up, we believe that NTFS format should be resolutely adopted when partitioning most hard disks. Of course, FAT32 is recommended for those old hard disks, which is the most effective way to solve the above problems. 5. Reasonable use of hard disk space Setting the recycle bin space directly affects the size of available space on the hard disk. It is best to set the size of your recycle bin to 5% of the hard disk space, and you should empty your recycle bin regularly. Another point is the setting of temporary storage space for Internet files in IE. If the setting is too large, the Internet files it stores will take up space on your hard disk. I think everyone must be very familiar with the setting process of these two items, so I won't go into details here. 1. Turn off system restore, my computer properties system restore, turn off system restore on all disks, 2. Turn off system hibernation, desktop property screen saver power hibernation, tick before starting system hibernation, 3. Turn off virtual memory, my computer properties advanced performance settings advanced changes, select drive C, which is the system disk, select no page, and then set virtual memory to its disk. Disks with large disk space, such as D, E, F, etc. 4. Clean up hard disk garbage and registry garbage with optimizer 5. Clean up IE temporary folder, delete COOKIES of IE attribute, and delete file 6. Start search *. Logs and *. Tmp until all 7 are deleted. Delete the system log and program log, my computer control panel management tool computer management event viewer application, right mouse button to clear all events, and then clear the system log in turn. 8. Clear the system cache: 2000 system is: all files under C:\WINNT\system32\dllcache; XP system is: all files under C:\windows\system32\dllcache. Open my computer, tools. Files and folders options, and then delete hidden protected system files from the check box to show all files. Then search dllcache and open it to delete all dllcache files. Note: You can run the sfc.exe/Purge cache command directly to delete it automatically. 9. Empty the recycle bin 10. Worms keep copying junk files, occupying system disk space, causing system paralysis. It is recommended to kill the virus 1 1. Delete the file 12 under c: \ Windows \ Software Distribution \ Download. Delete all directories under c: \ Windows \ Registered Packages13. Delete all files under C: \ Windows \ downloaded program file 14. My computer folder option to view and hide files that are known to be protected by the system, uncheck them, show all files and check OK. Delete all files with $ in c:\windows\. 27 optimization skills for releasing disk space C/Article/2005/0624/A20050624427685 What are the causes and solutions of hard disk space loss in shtml/dispbs.asp? BoardID = 70 & ampid=65 198