Format the SD-Card before dumping and OS-Image to the card.\\

If you are using an Unix OS everything can be done on command-line\\
Insert the SD-Card into the Card-Reader of the Unix-Workstation.\\
\\
Issue the following commmand:
<code>
df -h
</code>

The output is a complete list of storage-media that is actual available on the work-station.\\
Idetify your card, on my workstation the SD-Card is always "/dev/sdb"\\
\\
If the OS has automatically mounted the SD-Card unmount it now.\\
Therfor issue the following command:
<code>	
sudo diskutil umount /dev/sdb1
</code>	
or, as root:
<code>	
umount /dev/sdb1
</code>
	
Now a:
<code>
df -h
</code>

Should not display any hint of /dev/sdb, now start to copy the image bit by bit to the SD-Card.\\
As user root issue:

<code>
dd of=/dev/sdb if=/home/2013-07-26-wheezy-raspbian.img bs=1M
</code>

Note: "of" is the output-path, here /dev/sdb and "if" is the input-path, here the wheezy image. The bit by bit copy will take a while.\\ 
\\
SD-Card Backup and zip image:
<code>
dd if=/dev/sdb bs=1M | gzip > /home/k03b169/Downloads/Hot_Spot/Raspberry/ZipDD8GB.gz
</code>

Write zipped image back to SD-Card:
<code>
gzip -dc /home/k03b169/Downloads/Hot_Spot/Raspberry/image.gz | dd of=/dev/sdb bs=1M
</code>

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