ZFS

RAID

RAID1

Create RAID1 without mount point

# zpool create -m none data-pool mirror /dev/disk/by-id/ata-Hitachi_... /dev/disk/by-id/ata-SAMSUNG_...

Replacing disk

Replace disk

# zpool replace tank /dev/disk/by-id/ata-Hitachi_... /dev/disk/by-id/ata-SAMSUNG_...

Replace already removed device

# zpool replace data-pool /dev/disk/by-id/ata-QEMU_HARDDISK_QM00011-part1

Add devices to pool

Add vdev (raidz1) to existing pool

zpool add hdd-pool raidz1 /dev/xvdf /dev/xvdg /dev/xvdh

Enable periodic scrub (FreeBSD only)

# cat << EOF >> /etc/periodic.conf
daily_scrub_zfs_enable="YES"
daily_scrub_zfs_default_threshold="28"

TRIM (Linux only)

Run trim on zpool

# zpool trim data-pool

Check trim status

# zpool status -t data-pool

Misc

Create volume

# zfs create -V 10G tank/storage

Get volume size

# zfs get volsize tank/storage

Resize volume

# zfs set volsize=50G tank/storage

SWAP

# zfs create -V 4G -b $(getconf PAGESIZE) -o compression=zle \
             -o logbias=throughput -o sync=always \
             -o primarycache=metadata -o secondarycache=none \
             -o com.sun:auto-snapshot=false rpool/swap

Enable/disable compression

# zfs set compression=lz4 data-pool/data/logs
# zfs set compression=off data-pool/data/logs

Set quota

# zfs set quota=20G data-pool/data/ISO

Get all properties

# zfs get all data-pool