Every time it restarts, the sector 0 is rewritten. - China DOS Union Forum

After using the ghost "DISK TO DISK" for the NT3.51 hard drive (source disk: 2G/5G, target disk: 6G/6.4G), the new disk cannot boot the system. Then, using diskrw to view the 0th sector, it was found that the entire sector content was rewritten to non-zero content, and 55AA was also gone. But when executing diskrw 0 0 1 /l /p again, the sector content returned to normal.

Every time after restarting, viewing the target disk is like this. The first time it was all rewritten, and the next time it was normal when viewed.

So, replacing the target disk with a not-so-good 2G disk, this problem did not occur, although it still cannot boot the system.

Why does this problem of the 0th sector being temporarily rewritten occur?

Please give advice!

Is the hard disk boot sector protection enabled in the BIOS? Or is a restore card installed?

It's just temporarily rewritten, but actually there's no rewriting. And when the hard drive is hung on another machine, there won't be this kind of situation when viewed under DOS.

There is no restore card installed. Maybe there is identification protection (or encryption) for the hard drive in the motherboard BIOS.

Moreover, saying "temporarily rewritten" should be incorrect. I think it's just that after the BIOS identifies the 80 bootable, it provides the hijacking of the 0 sector.

If there is indeed such hijacking, is there a way to bypass this detection?

Floor1　jimian	Posted 2011-01-19 21:31
新手上路　Posts 8　Credits 14
After using the ghost "DISK TO DISK" for the NT3.51 hard drive (source disk: 2G/5G, target disk: 6G/6.4G), the new disk cannot boot the system. Then, using diskrw to view the 0th sector, it was found that the entire sector content was rewritten to non-zero content, and 55AA was also gone. But when executing diskrw 0 0 1 /l /p again, the sector content returned to normal. Every time after restarting, viewing the target disk is like this. The first time it was all rewritten, and the next time it was normal when viewed. So, replacing the target disk with a not-so-good 2G disk, this problem did not occur, although it still cannot boot the system. Why does this problem of the 0th sector being temporarily rewritten occur? Please give advice!

Floor2　fujianabc	Posted 2011-01-20 11:18
金牌会员　Posts 1,616　Credits 3,467
Is the hard disk boot sector protection enabled in the BIOS? Or is a restore card installed?

Floor3　jimian	Posted 2011-01-20 13:09
新手上路　Posts 8　Credits 14
It's just temporarily rewritten, but actually there's no rewriting. And when the hard drive is hung on another machine, there won't be this kind of situation when viewed under DOS. There is no restore card installed. Maybe there is identification protection (or encryption) for the hard drive in the motherboard BIOS. Moreover, saying "temporarily rewritten" should be incorrect. I think it's just that after the BIOS identifies the 80 bootable, it provides the hijacking of the 0 sector. If there is indeed such hijacking, is there a way to bypass this detection?