Lainaus:

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Q: I'd like to backup/restore the MBR.

A:
To backup use:
sudo dd if=/dev/hda of=mbr.backup bs=512 count=1
To restore use:
sudo dd of=/dev/hda if=mbr.backup bs=512 count=1

Caution the MBR contains the partition table (the first four primary entries)
it will break things if you changed the partition since the backup.

If you do not want to restore the partition table you should use
sudo dd of=/dev/hda if=mbr.backup bs=1 count=448 instead.
This will write only the first 448 bytes of the MBR leaving the last 64 bytes intact
(4 partition table entries * 16 bytes/entry).

Be warned that you may not be able to boot from this disk if you changed the partition table
after the backup of the MBR, depending on the actual boot loader .

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Lainaus:

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Ne myös löytyy piilotetulta osiolta, kun sen ensin tekee näkyväksi tai jollain pääsee selaamaan.

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