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中国DOS联盟论坛 » DOS疑难解答 & 问题讨论 (解答室) » Every time it restarts, the sector 0 is rewritten. View 1,915 Replies 2
Original Poster Posted 2011-01-19 21:31 ·  中国 江苏 苏州 联通
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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!
Floor 2 Posted 2011-01-20 11:18 ·  中国 上海 中国科学院上海分院
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Is the hard disk boot sector protection enabled in the BIOS? Or is a restore card installed?
Floor 3 Posted 2011-01-20 13:09 ·  中国 江苏 苏州 电信
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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?
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