How to back up Hard Drive boot area records

To prevent viruses from attacking the hard disk or other misoperations, backing up the boot records of the hard disk is an effective method.
If there is no ready-made tool software (such as srctools, a very useful tool, you can
Disk tool. For details about how to use this tool, see "dos" on this site. Article),
Debug is available. This section describes how to back up and write the Master Boot Record of a hard disk.
To back up the Master Boot Record, follow these steps:
Debug (Press ENTER)
-A 100
XXXX: 0100 mov ax, 201
XXXX: 0103 mov BX, 200
XXXX: 0106 mov CX, 1
XXXX: 0109 mov dx, 80
XXXX: 010c INT 13
XXXX: 010e INT 3
XXXX: 010f
-G = 100
-R CX
CX 000:200
-N boot. zyd
-W 200
-Q
To back up a DOS Partition Boot Record, follow these steps:
Debug (Press ENTER)
-L 100 201
-N boot. Dos
-R CX
CX 000:200
-W 100
-Q
The method to write the hard drive Boot Record is:
Debug (Press ENTER)
-N boot. zyd
-L 200
-A 100
XXXX: 0100 mov ax, 301
XXXX: 0103 mov BX, 200
XXXX: 0106 mov CX, 1
XXXX: 0109 mov dx, 80
XXXX: 010c INT 13
XXXX: 010e INT 3
XXXX: 010f
-G = 100
-Q
To write a DOS Partition Boot Record, follow these steps:
Debug (Press ENTER)
-N boot. Dos
-L 100
-W 100 201
-Q
This method can repair the hard disk without losing files. The backup hard disk Master Boot Record and DOS partition guide can be seen.
It is very convenient and necessary to export records.