Detailed description of Hard Disk low-level formatting

Hard Disks generally take three steps: low-level formatting, partitioning, and advanced formatting. Low-level formatting is generally completed by the hard disk manufacturer at the factory time. Common users only use other tools for partitioning and advanced formatting. However, sometimes we also need to format the hard disk low-level, to solve some problems that general tools cannot do, such as large bad sectors and small hard disks.
In general, it is difficult to repair a physical fault on the hard disk, but there is a way to try it, that is, low-level formatting.
Low-level formatting divides blank tiles into concentric circles and channels with different radius. It also divides the channels into several sectors with a capacity of 512 bytes.
In the following cases, low-level formatting may be necessary:
① Due to the influence of the external Strong Magnetic Body and strong magnetic field, or due to long-term use, the magnetic record part of the hard disk is lost in the sector format divided by low-level formatting, resulting in a large number of "Bad Sectors ". Note that this is not physical damage to the disk. In this case, low-level formatting and re-partitioning the slice may be an effective method.
② To improve the performance of the hard disk, it is usually used to try to reset the sector "interleave" to improve the speed of reading and writing. Of course, there are also some software such as calibrat in Norton Utilities for DOS 6.0-8.0 (calibration program in Norton Utilities for DOS 8.0) that can perform low-level formatting without damaging data on the hard disk, to optimize the interval factor and increase the hard disk speed.
Now, let's take a step-by-step look at the underlying formatting. First, download lformat.exe. This program can only be used in DOS mode and cannot be used in Windows dos windows.

Step 1: Enter the directory where the program is located, or disk A, and execute lformat. The following figure is displayed:

These words mean:
No commitment:
This tool does not have any explicit or implied guarantee, so it does not concern maxcompute if it causes any damage to your useful or stored data, it is none of the developer's business, and the company does not make it clear or imply that the damage caused by the failure of its software to achieve its functions.
The updates to the software are not subject to further notice.
Warning:
Using this software will cause all the data on this disk to be lost. Please back up all your data before using this software. We recommend that you unplug all other disks before using this plug-in. (To avoid fire, seedlings and fish ponds in the city. However, the floppy disk cannot be unplugged. Otherwise, what partitions and high grids will be used after the low-level disk is used .)

Press the "y" key to start the program. Other keys exit.

Step 2: When we press the "y" key, the following screen will appear:

The idea is:

Select drive Disk
Low Current Drive
Exit

Help window:
Use the arrow keys to select an operation you want, and then press the Enter key or return

Step 3: When we select the first item and press enter, a red dialog box appears.
The following figure is displayed:

Select drive Disk
Low Current Drive
Exit

Information window:
Which drive (,) will you choose)

Help window:
Use the arrow keys to select an operation you want, and then press the Enter key or return

Note: Generally, there are two ide interfaces on the motherboard, which can be connected to a maximum of four hard disks. (Of course, the SCSI interface is different from the current new motherboard which can be connected to eight hard disks) generally, we connect one ide interface to the hard disk and the other ide interface to the optical drive. One hard disk connection line has two interfaces, so there are four options, but the company warned me at the beginning, it is best to just pick up one hard disk to be low, he is afraid that if you have several hard disks on the machine, you may accidentally select one. However, as long as you carefully read the instructions, even if he is connected to several hard disks, it is still not a mistake. Now we should be the first time in a poor position, so I chose 1 as a mess. Everyone thinks everything starts from 1. The fourth step is displayed.

Step 4: select 1 from the four first items (0, 1, 2, 3. The following figure is displayed:

Select drive Disk
Low Current Drive
Exit

Current Drive is: 1
Model #: None
Serial number: #: None
Chip: None

Number of columns: 0 cores: 0 slice count: 0
Maximum logical zone: 0

Help window:
Use the arrow keys to select an operation you want, and then press the Enter key or return

(This window does not seem to be what we want, because it seems that it is all 0 and the model is: none. In this case, we found the error. It doesn't matter. So we Press ESC to exit the grid and select the first item. This time, we select 0 to check whether the Fifth picture is displayed. )

Step 5: We started to select 1, and we chose 0. The following figure is displayed:

Select drive Disk
Low Current Drive
Exit

Current Drive is: 0
Model #: IBM-DTLA-307020
Serial number: #: yhoyhf31775
Chip: tx30a50c

Number of columns: 16383 cores: 16 slice: 63
Maximum logical zone: 40188959

Help window:
Use the arrow keys to select an operation you want, and then press the Enter key or return

(From this window, there should be something we want. The drive is a 0-model product of IBM, with a capacity of 20 GB and 2 MB of High-speed cache, 7200 to every minute (take such a good stuff for testing, respectable and respectable), other such as serial number, chip version, different companies are different, such as the number of the column below: The number of Magnetic Head, sector, the maximum logical zone is not the scope of this tutorial. After finding it, we will use the arrow to select the second option, the current drive with a low lattice. The following figure is displayed .)

Step 6: The following figure is displayed:

Select drive Disk
Low Current Drive
Exit

Current Drive is: 0
Model #: IBM-DTLA-307020
Serial number: #: yhoyhf31775
Chip: tx30a50c

Number of columns: 16383 cores: 16 slice: 63
Maximum logical zone: 40188959

Help window:
Use the arrow keys to select an operation you want, and then press the Enter key or return

Step 7: The following figure is displayed:

Select drive Disk
Low Current Drive
Exit

Current Drive is: 0
Model #: IBM-DTLA-307020
Serial number: #: yhoyhf31775
Chip: tx30a50c

Number of columns: 16383 cores: 16 slice: 63
Maximum logical zone: 40188959

Help window:
Use the arrow keys to select an operation you want, and then press the Enter key or return

Note: there is an additional information window on this screen, which means whether or not you want to use the logical address space. If the disk is larger than 540m, you need to use the LBA mode. If the disk is smaller than 540m, you do not need to use the LBA mode, otherwise, it would be a pity that you can only use m for the low-end mode, so I pressed the y key.

Step 8: The following figure is displayed:

Select drive Disk
Low Current Drive
Exit

Current Drive is: 0
Model #: IBM-DTLA-307020
Serial number: #: yhoyhf31775
Chip: tx30a50c

Number of columns: 16383 cores: 16 slice: 63
Maximum logical zone: 40188959

Help window:
Use the arrow keys to select an operation you want, and then press the Enter key or return

Note: there is an additional information window on this screen, which means that all data on the hard disk will be lost by performing the following operations. Press Y to continue.

Step 9: The following figure is displayed:

It took a long time to complete (about 20 GB an hour ). Press the ESC key, select the third exit, and press Enter. Press power to partition the hard disk.
 

----------------------------------------------
But to be honest, when a hard disk needs low formatting, it means that the hard disk is almost the same, and it will not take long to fix it. It is better to buy a new one. The current big hard disk is so cheap.
I firmly oppose repairing Hard Disk Physical Bad sectors with low-level formatting. The reason is:
1: Hard Disk repair takes too long to hurt
2: all data is lost, causing backup trouble
3: complicated operations with poor results

Recommended:

Jin haishuo-efficiency source Disk Bad Track repair program retail version v1.6

(Transferred from Sohu it)