What are the function points of a hard drive protection card?

Hard disk protection card is also called restore card, its main function is to restore the data on the hard disk, hard disk protection card, what is a hard disk protection card. Every time you boot up, the hard drive protection card always allows some or all of the hard disk partitions to recover the previous contents. In other words, any modification to the protected partition of the hard drive is invalid, thus serving the purpose of protecting the data of the hard drive.

The principle of the hard disk protection card is simply that it takes over the reading and writing operations of the hard disk. An int13 interrupt, the protection card first takes over the int13 interrupt address with its own program when the system boots. In this way, as long as the hard disk is read and written, it must be protected by the protection program of the protection card.

That is, the FAT file allocation table, the main boot area of the hard disk, CMOS information, interrupt vector table and other information are saved to the temporary storage unit in the protection card. It is used to cope with the modification of the data in the hard disk. Whenever we write data to the hard disk, we actually complete the operation of writing to the hard disk, but we do not really modify the FAT in the hard disk.

Instead, it is written to the FAT table of the backup, which is why all writes are left without a system reboot.

The hard disk protection card occupies a very important position in the management of the school's computer room, basically achieving the goal of "one card worry-free", greatly reducing the maintenance of the computer room after using the hard disk protection card, and basically no need to worry about viruses, misoperation and other problems. Of course, if the hard drive is physically damaged, there is nothing the hard drive protector can do. ;

What is a hard disk protection card, explanation of computer professional terms

The hard disk protection card is a device used to protect hard disk data in the computer, a high-tech product that protects all kinds of data in the computer hard disk, prevents computer viruses, prevents computer system disorder and even collapse, and protects the computer boot system.

The hard disk protection card is supposed to protect the data of the hard disk from external influences and malicious modifications, and has the same nature as the system restore card, but the object of protection is different. You can plug it into the PCI slot, then install the driver, go into the system, and there will be the setup and usage of this part.

Hard disk protection card, is a small card, plugged in the motherboard, can protect your hard disk, after you enter the system, you can set to turn on protection, just want to find a photo for your hard disk, when you want to get back this photo in the future, you just need to boot and press f8, choose to recover data yourself, it's OK, of course, you can also choose to restore yourself every time you restart.

Just like the Restore Wizard, it can protect the files on the hard drive from viruses.

Because if you deal with it that way, you'll be miserable!

At least if it is the restoration card of Sanming, it is invalid if you unplug it directly. Formatting also does not clear the relevant information, because the protected content will be written to sectors 1-62, etc., and the sectors cannot be formatted. Unless, of course, you clear all the sectors!

First of all, see which protection it is (if it is hardware, the previous answer has been explained, look in the PCI slot, if it is a BIOS version, report the software name). Then** to the corresponding manufacturer. It is generally handled smoothly.

Try pressing the F10 or home button, the default password is 000000 and there are 12345678, and they also provide a dedicated uninstall tool.

In addition, if it is only a hard disk, attach it to any host (ensure that there is only this one hard disk). Use the uninstallation tool of the official website of Sanming, follow the process, and clear it directly! Usually normal.

Hard disk protection card, as the name suggests, is a "card", if it is a whole computer, then only open the case, see if there is any card in the PCI slot, first remove all of them, take a look at it yourself, if it is a restore card, you can look at the label on the card, what will be marked, what brand of restore card, if there is, just throw it away. If you don't see any card on the PCI slot, then it's generally software restore protection, and the solution is very simple, just format the hard disk and get it.

Try using the "Overwrite all hard drive data" in the partition tool. (There is it in the hard disk partition tool, you look carefully).

On the top floor, it is more complete If you don't know the password, you can only use the uninstall tool from the new partition or use the uninstall tool on the official website of the restore card, in accordance with it.

Process operations.

The principle of a hard disk protection card.

The ROM BIOS of the PC series microcomputer provides convenience for the adapter card with extended ROM program on the bus to carry out the system. During the power-on POST at host startup, interrupt vectors are created for each BIOS invoker, and after the default vectors are set, the extended ROM module is scanned. At this point, control is given to the ROM program on the adapter board, which can hook itself into the system by setting interrupt vectors.

In order to find a valid extension ROM on the adapter plug-in board, the absolute address c8000h e0000h is scanned in 2k units, i.e. the search is performed with c8000+m 800h as the starting address. A valid ROM block should meet the following definition: byte 0:

55h byte 1: AAH byte 2: length indicator.

It indicates the number of 512-byte blocks of information in the ROM (length 512). In order to test the integrity of the ROM module, you need to find a check sum. In the defined ROM, each byte is summed by modulo 100h, and its sum must be 0 for the module to be considered valid.

When the system's ROMbios finds a valid ROM, it makes a far call to byte 3 of the ROM (which will be an executable **) and the adapter can now perform its power-up initialization task. After initialization, the ROM on the adapter plug-in board should return control to the ROMios program via a far return command to boot the system.

It can be seen that the hard disk protection card is such an adapter plug-in board: the self-programmed software is solidified in the EPROM on the board as an accessible ROM component. When the system postes, it can modify the interrupt vector to hang itself on the system, and the program on the system can be detected by real-time tracking of files to achieve the purpose of protecting the C drive.