DD Imaging util

dd-local-monitor.sh

#!/bin/sh

# usage:
# sudo dd-local-monitor.sh if=/dev/sda bs=24M | gzip > /mnt/external/myimage.blob.gz

main () {

        echo "# dd: $@" >&2

        dd $@ &
        DDPID=$!
        
        while ps $DDPID >/dev/null; do 
                kill -USR1 $DDPID || break
                sleep 10
        done
}

main "$@"

dd-remote-pull-chunk.sh

#!/bin/sh

# arg 1: start index (default 0)
# arg 2: end index (default 20000)

REMOTE=root@remote-server
REMOTE_DEVICE=/dev/sda
OUTPUT=/mnt/external/images/0

mkdir -p $OUTPUT

sectionsize=1024
for i in `seq ${1:-0} ${2:-20000}`; do
        blockcount=$(( sectionsize * i ));
        command="dd if=${REMOTE_DEVICE} bs=1M count=${sectionsize} skip=${blockcount} | gzip"
        echo "# section $i (skip $blockcount) command:  ${command}"
        ssh $REMOTE "${command}" > ${OUTPUT}/image.$i.blob.gz || break
done

dd-remote-restore-chunk.sh

#!/bin/sh

# arg 1: start index (default 0)
# arg 2: end index (default 20000)


REMOTE=root@remote-server
REMOTE_DEVICE=/dev/sda
INPUT=/mnt/external/images/0


sectionsize=1024
for i in `seq ${1:-0} ${2:-20000}`; do
        blockcount=$(( sectionsize * i ));
        command="gzip -cd | dd of=${REMOTE_DEVICE} bs=1M count=${sectionsize} seek=${blockcount}"
        echo "# section $i (skip $blockcount) command:  ${command}"
        cat ${INPUT}/image.$i.blob.gz | ssh $REMOTE "${command}" || break
done