Pls my computer s total hard drive size has been reduced by 10G

The hard drive size is in the order of magnitude 1000, not 1024.

An 80g hard drive should be 80*1000*1000*1000 bits, which is normal.

Your hard drive is suddenly missing 10G for the following reasons should be considered:

1. Virus (more likely).

2. Disk bad sectors (general possibility).

3. System problems (most likely).

Suggestions: 1. Use genuine and latest antivirus software to kill viruses, and it is recommended that Rising is recommended.

2. Reinstall the system, (by the way, check if there is any undivided area).

3. If the disk surface is damaged, you must find a professional to repair it.

Right-click on My Computer, select Management, Disk Manager, and see if your hard drive has any hidden partitions.

If it is an IBM or AUSA brand machine, there is usually a certain area as a hidden area.

Hidden partitions can be viewed through the disk manager.

80G hard drives are generally only about 76G. This is calculated with the shrinkage method of 1000m=1g from the hard disk vendor.

If there is a bad sector during use, the system will isolate it and not see it!

This is normal! It seems that the hard disk manufacturer converts the size according to the ratio of 1000, and the situation is converted according to the ratio of 1024.

My opinion is still caused by the bad sector of the disk.,The machine I bought in 02 has almost reduced by 7-8g now.,I haven't heard of the reduction in disk capacity caused by viruses!

It's not going to change. There were so many when you bought it, but you didn't pay attention to it.

Upstairs, it doesn't seem to be like that, in fact, it's 1024kb 1mb for the computer, 1000kb 1mb for the manufacturer

70g should be about the same if it is calculated by checking the attributes.

The manufacturer converts the size according to the ratio of 1000, but it is actually converted according to the ratio of 1024.

That's because there are still some system files that are hidden, you can change the folder option, and the hidden files will be displayed, of course, some files can't be deleted, delete the ones that can be deleted, and the space will come out.

Because there are still 10G file attributes that you changed to hide, so you only see 10G, in fact, the space has taken up 20G

It may be that there is an error in the system file directory of the disk, so you can check the error and deal with it: right-click on your (l:) local disk icon, and it will appear in the pop-up list"attributes"click on it, and then click on "Tools.""option to click on and then select"Check for errors"on"Start troubleshooting"Button.

Maybe this trick will work.

It may be that there is virtual memory set up in this disk, or there are hidden files. Copy things to other disks first, format it, if the display is still occupied, it means that there is virtual memory.

Move the data to another drive, format it, and try it!

Caches, system files, hidden files, etc.

Because there are hidden files or system files.

Is there an installation package or something.

It can be said that this phenomenon is a normal phenomenon, and it can also be said to be the result of a misunderstanding of the hard disk, and then let's analyze how the partition of the hard disk and the capacity of the hard disk are calculated.

At present, there are several types of lattice methods, such as FAT12, FAT16, FAT32, NTFS, HPFS and Linux, etc., and the smallest unit of partition is Co, for example, if the FAT16 mode is used, the cluster is 32KB, and if the FAT32 mode is used, the cluster is 4KB. A cluster can only be allocated to one file (even if the cluster has 32 KB of files and a file uses only one byte), which inevitably leads to a waste of disk space (unused capacity in the cluster is wasted). Theoretically, the average disk space wasted by each file is half of the cluster capacity, that is, if the capacity of a cluster is 4kb, then each file is wasted 2kb, if the capacity of a cluster is 32kb, then the waste of capacity for each file is 16kb, for example, a 2G hard disk is formatted in FAT16 mode, then its cluster is 32kb, and each file will waste 16kb, if there are 20480 files on the disk partition, The wasted space is 20480 16 1024 = 320MB.

If the same is the same as the FAT32 formatting, its cluster is 4kb, in this way, the average waste of each file is 2kb, if there are still 20480 files on the hard disk, the wasted space is 20480 2 1024=40m. One wastes 320 MB and the other wastes 40 MB, so now you know which way to use the grating to waste less space.

Mathematically, 1g=1000m, 1m=1000k, 1k=1000

In the operating system, it is considered 1g=1024m 1m=1024k 1k=1024

So the actual capacity of a 100M hard drive formatted out is:

So you will find that the actual capacity of the original 500g hard disk is approximately:

Hard drive manufacturer's standard:

500gb=500，000mb=500，000，000kb=500，000，000，000byte；

Algorithm of the operating system:

500gb=512，000mb=524，288，000kb=536，870,912，000byte；

The capacity shown in the operating system is:

2.MacBook hard drive capacity is small? Install the Windows system into the portable hard disk (USB flash drive) to save your MacBook from running out of space MacBook Apple Laptop Dual System.

Take a look,When you do the system,Is there a backup?,And the envy is,Like Lenovo's book, he has a hidden partition himself,You use DM or PQ to see,Is there a group of slip to shoot an invisible partition in the computer,Delete him from the point on the line to let tremble,If you're using really Lenovo's book, it's best not to delete it.,It's a one-click restore in there,

Why does the actual capacity of the hard disk not match the nominal capacity?

Hard disk is an important part of personal computer to store data, and its capacity determines the ability of personal computer to store large data and small files, which is one of the first parameters that users should pay attention to when buying hard disks.

The capacity of hard disks is in MB (megabytes) and GB (gigabits), the early hard disk capacity is low, mostly in MB (megabytes), in September 1956, IBM made the world's first disk storage system only 5MB, and now the rapid development of hard disk technology hundreds of GB capacity of hard disks have also entered the hands of home users. The capacity of the hard disk is 40GB, 60GB, 80GB, 100GB, etc

120GB, 160GB, 200GB, hard disk technology continues to advance, and larger capacity hard drives will continue to be introduced.

After buying a hard drive, careful people will find that the capacity of the hard disk in the operating system does not match the official nominal capacity, it is less than the nominal capacity, and the larger the capacity, the greater the difference. A hard drive with a nominal 40GB is only 38GB in the operating system; An 80GB hard drive is only 75GB; A 120GB hard drive is only 114GB. This is not caused by manufacturers or distributors deceiving consumers with shoddy products, but by the different calculation methods of hard disk manufacturers and operating systems, and by different unit conversion relationships.

As we all know, binary is used in computers, so that the calculation of capacity in the operating system is based on every 1024 as a base and every 1024 bytes.

1KB, 1MB per 1024KB, 1GB per 1024MB; In terms of computing capacity, hard disk manufacturers use every 1000 bytes as a base, 1kb per 1000 bytes, and every 1000kb

is 1MB, and every 1000MB is 1GB, and the difference in the base system of the two has caused the capacity of the hard disk to "shrink".

Take a 120GB hard drive as an example:

Manufacturer capacity calculation method: 120GB 120,000MB 120,000,000KB 120,000,000,000 bytes.

Converted to operating system, 120,000,000,000 bytes 1024 117,187,500kb 1024 114,. Not scattered.

At the same time, in the operating system, the hard disk must also be partitioned and formatted, so that the system will also occupy some space on the hard disk and provide it for system files to use, so there will be a difference between the hard disk capacity and the nominal capacity displayed in the operating system.

Win10 system C disk space is not enough, learn this trick, can release 10G junk files.