Backup Restore MBR And Partition Table Linux

Learning|Tutorial October 14, 2011
1)Master Boot sector it is 512 bytes
2)Locate at the First Sector in Hard Disk or Storage Device
3)MBR Total Size 512 Bytes
Bootstrap = 446 bytes
Partition Table = 64 bytes
Signature = 2 bytes


Backup Only Master Boot Sector Not Partition Table
#dd if=/dev/sda of=/tmp/mbr.bak bs=512 count=1
Restore
#dd if=/tmp/mbr.bak of=/dev/sdb bs=446 count=1

Backup Only the Partition Not Master Boot Sectore MBR
#dd if=/dev/sda of=/tmp/part.bak bs=512 count=1
Restore
#dd if=/tmp/part.bak of=/dev/sdb bs=1 count=64 skip=446 seek=446

How to Create the Boot Load in MBR Refer the Link Restore Recreate Lost MBR Grub Boot Loader Linux
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2 Comments

  1. Kao DomeFebruary 16, 2012 at 2:02 AM

    Hello, thank you for this information.

    So... backing up the partition table and MBR share the exact same command? The only difference is when restoring?

    Say I want to restore a previous MBR and partition table the required command would be:

    dd if=backup.bak of=/dev/sda ?

    ReplyDelete
  2. Learning|TutorialFebruary 23, 2012 at 2:04 AM

    To Restore the MBR

    #dd if=/tmp/part.bak of=/dev/sdb bs=1 count=64 skip=446 seek=446

    ReplyDelete