Re: [Gumstix-users] SDCard BackUp

[j <vwy...@gm...>]

On 05/15/2012 01:56 AM, Sergi Torrellas wrote:
> Hi All,
>
> I've struggling these last days in creating a backUp image of the 
> SDCard of the Gumstix.
>
> (1) You can use the following to compress the SDCard:
>
> #!/bin/bash
> cd /media/rootfs/
> tar -cpjvf /home/sergi/AngstromDistros/compressed.tar.bz2 . 
> --numeric-owner
>
> tar is the name of the program we're using to compress/store the rootfs
>
>   * c is create a new archive
>   * p is to ensure the permissions are kept the same. This is VERY
>     important, some files require specific levels of privileges in
>     order to work correctly. This is probably default when run with
>     sudo, but it doesn't hurt to put it in.
>   * j means use bz2 compression
>   * v means verbose. This will spit out the file names that it's
>     currently archiving to the terminal.
>   * f is for file
>   * --numeric-owner will store the owners of the files as numbers. I
>     don't understand this, I read it here
>     <http://www.halfgaar.net/backing-up-unix#section-2.1>
>
>
> (2) You use the following to uncompress the file to the SDCard:
>
> #!/bin/bash
> tar -xpjvf /home/sergi/AngstromDistros/compressed.tar.bz2 -C 
> /media/rootfs/ --numeric-owner
>
> I used this page 
> <http://pandorawiki.org/How_to_back_up_a_Root_File_System_%28on_an_SD_Card%29_to_an_SD_Card> 
> as inspiration
>
> Hope this helps,
>
> Sergi
>
> -- 
> **
> *Sergi TORRELLAS
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Here is another method as well

dd if=/dev/sd(a) of=sd1gb.dd  -- copy off
dd if=/sd1gb.dd of=/dev/sd(a) -- put back on

another way with compression would be

dd if=/dev/sd(a) of=sd1gb.dd | tar zcvf sd1gb.dd.tar.gz --- to copy it off the card
tar Ozxf sd1gb.dd.tar.gz | dd of=/dev/sd(a)  --- put back on the card. It is a letter O not a zero in the tar command