cpio + gzip

壓縮

$find folder1 | cpio -ocvB | gzip > folder1.cpio.gz

$dd if=/dev/sdan bs=4096 conv=notrunc,noerror | gzip > /path/image.gz

解壓縮

$gzip -dc folder1.cpio.gz | cpio -idv

$gzip -dc /path/image.gz | dd of=/dev/sdan bs=4096 conv=notrunc,noerror