# ZFS Cheat Sheet

# Replace disk 

```
zfs offline <PoolName> <DiskName>
# New HDD insert
zfs replace <PoolName> <DiskName>
```

# Snapshots

* create snapshot: ```zfs snapshot <POOL>@<SNAPSHOT_NAME>```
* List snapshots: ```zfs list -t snapshot```
* delete snapshot: ```zfs destroy <POOL>@<SNAPSHOT_NAME>```
* delete multiple snapshots: 
	```
    # Be very careful!
    zfs list -H -t snapshot -o name -S creation -r > snapshots.txt
    # Remove snapshots to keep from file
    cat snapshots.txt | xargs -n 1 sudo zfs destroy
    rm snapshots.txt
    ```
* delete oldest 10 snapshots: ```zfs list -H -t snapshot -o name -S creation -r <POOL> | tail -10 | xargs -n 1 sudo zfs destroy```

# Status

* Basic status: ```zpool status```
* Status with GUUIDs: ```zpool status -g```
* Show storage usage: ```zfs list```

# Setup

* Import existing ZPool: ```sudo zpool import <POOL>```