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user 71214
a resource for storing information (think of it as a counterpart of a paper document). Typically stored on a durable medium, e.g. hard-disk drives or flash memory.
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Is there a way to compress a backup of the RPi because the backup has empty space?
to /tgtfs/image.raw and you are root:
mkdir /srcfs && mount /dev/sdXN /srcfs
Use zerofill or just:
dd if=/dev/zero of=/srcfs/tmpzero.txt
To fill unused blocks with zero (wait for it to fill the file … dd as zero blocks are highly compressible:
dd if=/dev/sdxn | gz -c | dd of=/tgtfs/image.raw
PS: You should note that this is not a good idea on a flash memory based storage media (i.e. your source file …
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