ZFS
List the size of all the datasets
zfs list -o name,used
Create a zfs dataset
zfs create zpool1/datasetname
You can also create a blockdevice on zfs. Which is called a zvol Create a zvol with 100GB size
zfs create -V 100G [zfspl]/[dataset]
Create a encrypted dataset with a passhprase. It will prompt you for a passphrase
zfs create -o encryption=on -o keylocation=prompt -o keyformat=passphrase zpool1/dataset
Load the key to decrypt a ZFS dataset. This is needed after a reboot to access your data.
zfs load-key -r zpool1/dataset
Sort snapshots by date
zfs list -t snapshot -o name,creation -s creation