The page http://www.nongnu.org/lzip/xz_inadequate.html convinced me that it would be better to use lzip instead of xz or gzip compression for a backup.
Unfortunately the non-parallel version both of lzip would take too long for me.
The combination of a 500GB disk and an old CPU and
does not finish overnight if I use lzip (or xz) instead of pigz
Code: Select all
dd if=/dev/sda | pigz -c -3 >xx_YYYYMMDD.img.gz
Thanks for SystemRescueCd!