ZFS disk usage explained in one handy guide - ZedFS
zedfs.com › all-you-have-to-know-about-reading-zfsMay 16, 2020 · The zfs list says that we are using 23KB of data. du(1) is saying a few bytes and ls(1) is reporting a GB. The case is the written file is compressed or full of zeros which ZFS also compress. The du(1) tool reports how many bytes are used to store the contents of the files after compression, dedupe and so on. The ls -l shows the real size of the file. If you plan to copy a file to a different FS without compression you need to prepare to have enough disk size.