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Old 03-01-2005, 09:32 PM   #1
sgzlit
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How to backup & restore the MBR in linux?


I am searching a way to backup and restore the MBR of the disk in linux.
who has some good ideas to do it?
you are appreciatedto share your experience!

thx a lot
 
Old 03-01-2005, 09:35 PM   #2
Matir
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For a pure backup:
Code:
dd if=/dev/hda of=BACKUPMBR bs=512 count=1
Obviously, replace /dev/hda with the appropriate device for your system.
 
Old 03-01-2005, 09:39 PM   #3
BajaNick
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Matir, Could you break down that line and tell us what each of those commands do? Thanks.
 
Old 03-01-2005, 09:57 PM   #4
Matir
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Hehe, sure.
[code]dd if=/dev/hda of=BACKUPMBR bs=512 count=1[/count]
  • dd: program to perform bit-by-bit copying.
  • if: input file (or device) to read from
  • of: output file (or device) to write to
  • bs: block size, in bytes
  • count: number of blocks to read/write
This will copy the first 512 bytes of the /dev/hda (which is the Master Boot Record) to the file "BACKUPMBR".

Hope this helps.
 
Old 03-01-2005, 11:09 PM   #5
BajaNick
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Cool, Thanks.
 
Old 03-01-2005, 11:25 PM   #6
amosf
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If you do a man dd you get lots of this cool info...
 
Old 03-02-2005, 09:33 AM   #7
Matir
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You can do almost anything with dd! It even makes pancakes (ok, not really).

dd if=/dev/hda of=BACKUPMBR bs=512 count=1 means to copy 1 block of 512 bytes from /dev/hda to BACKUPMBR.

Hope that helps. The formatting was fun anyway.
 
Old 03-02-2005, 09:07 PM   #8
BajaNick
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Quote:
Originally posted by amosf
If you do a man dd you get lots of this cool info...
I did that right after the last post.
 
  


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