# Create 4K gnop(8) devices for the first disk of each of the three vdevs
$ sudo gnop create -S 4096 /dev/label/disk1 /dev/label/disk5 /dev/label/disk8
 
# Create the backup pool using three RAID-Z1 vdevs
$ sudo zpool create backup raidz /dev/label/disk1.nop /dev/label/disk2 /dev/label/disk3 /dev/label/disk4
$ sudo zpool add backup raidz /dev/label/disk5.nop /dev/label/disk6 /dev/label/disk7 /dev/label/disk12
$ sudo zpool add backup raidz /dev/label/disk8.nop /dev/label/disk9 /dev/label/disk10 /dev/label/disk11
 
$ zpool list  
NAME     SIZE  ALLOC   FREE    CAP  DEDUP  HEALTH  ALTROOT  
backup  21.8T  1.29M  21.7T     0%  1.00x  ONLINE  -
 
$ zpool status  
  pool: backup  
 state: ONLINE  
  scan: none requested  
config:  
  
        NAME                  STATE     READ WRITE CKSUM  
        backup                ONLINE       0     0     0  
          raidz1-0            ONLINE       0     0     0  
            label/disk1.nop   ONLINE       0     0     0  
            label/disk2.nop   ONLINE       0     0     0  
            label/disk3.nop   ONLINE       0     0     0  
            label/disk4.nop   ONLINE       0     0     0  
          raidz1-1            ONLINE       0     0     0  
            label/disk5.nop   ONLINE       0     0     0  
            label/disk6.nop   ONLINE       0     0     0  
            label/disk7.nop   ONLINE       0     0     0  
            label/disk12.nop  ONLINE       0     0     0  
          raidz1-2            ONLINE       0     0     0  
            label/disk8.nop   ONLINE       0     0     0  
            label/disk9.nop   ONLINE       0     0     0  
            label/disk10.nop  ONLINE       0     0     0
            label/disk11.nop  ONLINE       0     0     0
 
errors: No known data errors
 
# Check that the vdevs are 4K-aligned (ashift = 12)
$ zdb | grep ashift
            ashift: 12
            ashift: 12
            ashift: 12
 
# Export the pool
$ sudo zpool export backup
 
# Destroy the gnop(8) devices
$ sudo gnop destroy /dev/label/disk1.nop /dev/label/disk5.nop /dev/label/disk8.nop
 
# Import the pool
$ sudo zpool import backup
 
$ zpool status
  pool: backup
 state: ONLINE
  scan: none requested
config:
 
        NAME              STATE     READ WRITE CKSUM
        backup            ONLINE       0     0     0
          raidz1-0        ONLINE       0     0     0
            label/disk1   ONLINE       0     0     0
            label/disk2   ONLINE       0     0     0
            label/disk3   ONLINE       0     0     0
            label/disk4   ONLINE       0     0     0
          raidz1-1        ONLINE       0     0     0
            label/disk5   ONLINE       0     0     0
            label/disk6   ONLINE       0     0     0
            label/disk7   ONLINE       0     0     0
            label/disk12  ONLINE       0     0     0
          raidz1-2        ONLINE       0     0     0
            label/disk8   ONLINE       0     0     0
            label/disk9   ONLINE       0     0     0
            label/disk10  ONLINE       0     0     0
            label/disk11  ONLINE       0     0     0
 
errors: No known data errors

# Add a hot spare

$ sudo zpool add backup spare /dev/label/disk13

$ zpool status
  pool: backup
 state: ONLINE
  scan: none requested
config:

        NAME              STATE     READ WRITE CKSUM
        backup            ONLINE       0     0     0
          raidz1-0        ONLINE       0     0     0
            label/disk1   ONLINE       0     0     0
            label/disk2   ONLINE       0     0     0
            label/disk3   ONLINE       0     0     0
            label/disk4   ONLINE       0     0     0
          raidz1-1        ONLINE       0     0     0
            label/disk5   ONLINE       0     0     0
            label/disk6   ONLINE       0     0     0
            label/disk7   ONLINE       0     0     0
            label/disk12  ONLINE       0     0     0
          raidz1-2        ONLINE       0     0     0
            label/disk8   ONLINE       0     0     0
            label/disk9   ONLINE       0     0     0
            label/disk10  ONLINE       0     0     0
            label/disk11  ONLINE       0     0     0
        spares
          label/disk13    AVAIL   

errors: No known data errors

# Enable lz4 compression
$ sudo zfs set compression=lz4 backup
 
# Create media and scratch filesets
$ sudo zfs create backup/media
$ sudo zfs create backup/scratch
 
# Check that compression is enabled
$ zfs get compression
NAME            PROPERTY     VALUE     SOURCE
backup          compression  lz4       local
backup/media    compression  lz4       inherited from backup
backup/scratch  compression  lz4       inherited from backup

# Set 500M quota for backup/scratch
$ sudo zfs set quota=500M backup/scratch

# Check that the quota was set
$ zfs get quota backup/scratch
NAME            PROPERTY  VALUE  SOURCE
backup/scratch  quota     500M   local