ZFS cheatsheet

create

single device:

zpool create POOLNAME /dev/sdc

to add more than one device at once:

zpool create POOLNAME /dev/sda /dev/sdb /dev/sdc

mirror: It’s not really secure to have important data only on one disk or just striped, so its strongly recommended to use the mirror command (or raidz) like this:

zpool create POOLNAME mirror /dev/sda /dev/sdb

this will mirror everything on /dev/sda on /dev/sdb, so if one disk fails, you dont loose your data

you can add more mirrored disks to the pool as easy as:

zpool add POOLNAME mirror /dev/sdc /dev/sdd

HINT list all your blockdevices with lsblk:

lsblk

adding more devices to a pool

zpool add POOLNAME /dev/sdd /dev/sde /dev/sdf

listing pools

zpool list

get mountpoint

zfs get mountpoint

INFO: default only writeable by root, chmod if needed

check io

zpool iostat -v

INFO: this will show you current io statistics
HINT: use zpool iostat -v 1 to refresh the view every second

delete pool