K42.7z

For large file sets, 7z provides multi-core compression, making it faster than many single-threaded alternatives. More details on using 7z with block devices ?

7z can be used to archive the contents of block devices, such as /dev/sda1 , by piping data from cat or similar commands. Typical Scenarios K42.7z

You can skip compression while still including files by setting the compression level to 0 (store). For large file sets, 7z provides multi-core compression,