My 160G hard drive became 660G

When discs are produced, they are not perfect.

The effective capacity is tested before leaving the factory, and then the damaged area is shielded.

Then, based on the remaining space, it is decided what type of product the platter should be encapsulated in.

Generally, this process will shield a little good space. In order to achieve the unity of the same model of products, or to leave room for future hard drive repair.

But your 660 is encapsulated into 160... It's too disparity, isn't it?

Leave a good use. As for the bad sectors. To put it bluntly, any hard drive has it. It's nothing more than some people know, and some people don't. There's no need to worry too much.

You can consider using MHDD to check if your hard drive is HPA-used. After MHDD captures the parameters of the hard disk, pay attention to whether there is the word HPA in the upper menu. If there is an NHPA, it is lifted.

DoS is more accurate.

Backed up important data to other hard drives.

You're using diskgen to check if it's still 660g

In some cases, the software may read the parameters of the hard disk with deviations, partition disorders, and firmware information with errors.

It's weird, but it's possible that the big hard disk has shielded the bad sectors, so in this way, it may also be a software detection problem.

For example, if you buy a 40GB hard drive, but the actual usability may only be 38GB, why is this? The reasons can be explained in the following aspects:

Manufacturers generally calculate capacity at 1000K bytes per megabyte, while most motherboards use 1048K as one megabyte for BIOS and test software. This results in a difference of about 5 per cent.

The capacity of the hard disk is divided into the physical disk capacity calculated purely by the number of heads, the number of cylinders and other physical parameters, and the actual available space after partitioning, formatting, etc., and the capacity of the hard disk is not the same under different operating systems.

Selecting different working modes (normal, lba, large) in CMOS may also cause capacity inconsistencies.

Due to the influence of these factors, generally speaking, it should be normal for there to be a gap of about 5%-10% between the test capacity of the hard disk and the nominal capacity.

Manufacturer calculation method: 80g 80 * 1000m 80 * 1000 * 1000k 80 * 1000 * 1000 * 1000b

Computer conversion to: (80*1000*1000*1000)b (80*1000*1000*1000) g

Problem Analysis and Inspection Methods:

1. From the formatted 150GB capacity, it has been shown that this hard disk has been used for nearly ten years. When something goes wrong with something old, it's just like when people get old, it's natural. For hard disk products before 2000, the manufacturer's warranty is 3 years, and the design life of civilian products is 5 years.

When its partition table fails, capacity is lost;

2. If you see the information in Explorer () for the user's 36GB capacity, you can enter the "Management Disk Management" window of the system to check whether there is unallocated disk space. If so, it is mostly caused by the user's faulty disk operation;

3. If the hard disk has multiple partitions, when the drive letters of other partitions are lost, the explorer will not display these partitions without drive letters, and their total capacity will naturally be insufficient. The differential segment enters the Disk Management window, and the capacity can be restored by assigning its partition drive letter.