MBR sichern und wieder herstellen

backing up MBR stored on /dev/sdX or /dev/hdX:

dd if=/dev/sdX of=/tmp/sda-mbr.bin bs=512 count=1

Now to restore partition table to disk, all you need to do is use dd command:

dd if= sda-mbr.bin of=/dev/sdX bs=1 count=64 skip=446 seek=446

To restore partition table and boot loader:

dd if= sda-mbr.bin of=/dev/sdX bs=512 count=1

list of devices:

/dev/hda = IDE, primary master
/dev/hdb = IDE, primary slave
/dev/hdc = IDE, secondary master
/dev/hdd = IDE, secondary slave

/dev/sda = erste SCSI Platte
/dev/sdb = zweite SCSI Platte