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bmaptool

Create or Copy blockmaps intelligently (and therefore faster than cp or dd).

Create a blockmap from image file:

bmaptool create -o {{blockmap.bmap}} {{source.img}}

Copy an image file into sdb:

bmaptool copy --bmap {{blockmap.bmap}} {{source.img}} {{/dev/sdb}}

Copy a compressed image file into sdb:

bmaptool copy --bmap {{blockmap.bmap}} {{source.img.gz}} {{/dev/sdb}}

Copy an image file into sdb without using a blockmap:

bmaptool copy --nobmap {{source.img}} {{/dev/sdb}}