# ZFS

# migration

These commands will migrate one zfs pool to another server using netcat
```bash
zfs snapshot -r data@migrate_20200215
zfs list -t snapshot
zfs send -R data@migrate_20200215 | nc -l 3333
```
On the remote server you can execute
```bash
nc 10.7.10.71 3333 | zfs recv -Fd data
```
The version with netcat performed with much higher transfere speed than if you would use ssh.

# installation

```bash
apt install lsscsi hddtemp lm-sensors vim htop screen mpt-status smartmontools parted lsof hdparm zfsutils-linux -y
```
Clean disks
```bash
wipefs -a /dev/sdb
```
RAIDZ1
```bash
zpool create data raidz1 sdb sdi sdq raidz1 sdc sdj sdr raidz1 sdd sdk sds raidz1 sde sdl sdt raidz1 sdf sdm sdu raidz1 sdg sdn sdv raidz1 sdh sdo sdw
```
RAIDZ2
```bash
zpool create data raidz2 sdb sdc sdy sdz sdq sdr raidz2 sdd sde sdw sdx sdo sdp raidz2 sdf sdg sdu sdv sdm sdn raidz2 sdh sdi sdk sdl sds sdt
```
```bash
zfs set compression=zstd data
```
```bash
zpool export data
zpool import -d /dev/disk/by-id data
```
```bash
zfs set mountpoint=/var/lib/docker data
```
```bash
zfs set mountpoint=none data
```
```bash
zfs get mountpoint data
```

# pool



# replace

```bash
blkid
```

```bash
lsblk -r|awk 'NR==1{print $0" DEVICE-ID(S)"}NR>1{dev=$1;printf $0" ";system("find /dev/disk/by-id -lname \"*"dev"\" -printf \" %p\"");print "";}'
```

```bash
udevadm info --query=all --name=/dev/sdd | grep SCSI_IDENT_SERIAL
```

```bash
sdb 8:16 0 2.7T 0 disk   /dev/disk/by-id/wwn-0x5000cca0585fdc44 /dev/disk/by-id/scsi-35000cca0585fdc44
```

```bash
zpool offline data 8254740297691293767
```

```bash
zpool replace data 8254740297691293767 /dev/disk/by-id/wwn-0x5000cca0585fdc44
```