$ cat /proc/partitions|grep sda
   8        0  488386584 sda
   8        1       1024 sda1
   8        2  488383488 sda2
   8       16   39078144 sdb
   8       32 6836191232 sdc
   8       64 6836191232 sde
   8       48 6836191232 sdd
   8       80 6836191232 sdf
   
   
   
$ sudo modprobe zfs


$ lsmod|grep zfs
zfs       3039232  3
zunicode   331776  1 zfs
zavl        16384  1 zfs
icp        253952  1 zfs
zcommon     65536  1 zfs
znvpair     77824  2 zfs,zcommon
spl        102400  4 zfs,icp,znvpair,zcommon


$ sudo zpool create -f myvol raidz sdc sdd sde sdf


$ sudo zfs set atime=off myvol


$ sudo zfs get atime myvol
NAME   PROPERTY  VALUE  SOURCE
myvol  atime     off    local


$ sudo zfs set compression=off myvol


$ sudo zfs get compression myvol
NAME   PROPERTY     VALUE     SOURCE
myvol  compression  off       default


$ sudo modprobe zfs zfs_arc_max=4294967296


options zfs zfs_arc_max=4294967296


$ cat /sys/module/zfs/parameters/zfs_arc_max
0


$ echo 4294967296 |sudo tee -a /sys/module/zfs/parameters/zfs_arc_max
4294967296
$ cat /sys/module/zfs/parameters/zfs_arc_max
4294967296


$ cat /proc/partitions|grep nvme
 259        0  244198584 nvme0n1
 259        3   97654784 nvme0n1p1
 259        4   96679936 nvme0n1p2
 
 
 $ sudo zpool add myvol cache nvme0n1p1
 
 
 $ sudo zpool add myvol log nvme0n1p2