restore image to sd card

[corkscrew2094]

Hi
I have been backing up my pi regularly by removing the sd card and creating an image of it on my main pc running Linux Mint 17, using the following command

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sudo dcfldd if=/dev/sdb | gzip > /media/cem/data/iso/pi/8gpi04-1.gz

This command works perfectly and creates the images, however when I try to restore on of the image's with

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sudo gzip -dc /media/cem/data/iso/pi/8gbi04 | dd of=/dev/sdb

I get the following error

dd: failed to open ‘/dev/sdb’: Permission denied

I have been following the instructions from http://www.libregeek.org/2014/03/15/bac ... pberry-pi/

What am I doing wrong?

[drgeoff]

Try doing the gzip and the dd operations separately. sudo for the dd command.

[rpdom]

or try

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gzip -dc /media/cem/data/iso/pi/8gbi04 | sudo dd of=/dev/sdb

You might also need sudo for the gzip (I don't know Mint, doesn't it have gunzip or zcat?), depending on the read permissions on the file.

[corkscrew2094]

Brilliant!! just needed to move the sudo part to in front of dd

[IgorGanapolsky]

or try

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gzip -dc /media/cem/data/iso/pi/8gbi04 | sudo dd of=/dev/sdb

You might also need sudo for the gzip (I don't know Mint, doesn't it have gunzip or zcat?), depending on the read permissions on the file.

Awesome answer. It is easy to miss the omitted `sudo` in the dd part after the pipe.