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# ZFS pools
Manages ZFS pools.
zfs_pools = {
"tank": {
"when_creating": {
"config": [
{
"type": "mirror",
"devices": {
"/dev/sda",
"/dev/sdb",
},
},
],
"ashift": 12,
},
"autoexpand": False,
"autoreplace": False,
"autotrim": True,
},
}
<br><br>
# Attribute reference
See also: [The list of generic builtin item attributes](../repo/items.py.md#builtin-item-attributes)
<hr>
## config
A list of dicts. This allows you to create arbitrary pool configurations.
Each dict must include a `devices` key, which must contain atleast one
device to use. `type` is optional, if set, it must be one of these types:
* `mirror` - creates a mirrored vdev (like RAID1)
* `raidz` - creates a raidz vdev (like RAID5)
* `raidz2` - creates a raidz2 vdev (like RAID6)
* `raidz3` - creates a raidz3 vdev
* `log` - creates a ZIL vdev
* `cache` - creates a L2ARC vdev
When creating a `log` vdev, you may only use one or two devices. BundleWrap
will automatically create a `log mirror` if you specify two devices for your
`log` vdev.
<hr>
## ashift
Sets the `ashift` attribute for a to-be-created pool. `ashift` gets
ignored if the requested pool already exists.
<hr>
## autoexpand, autoreplace, and autotrim
Sets the corresponding zpool options `autoexpand`, `autoreplace` and
`autotrim`.
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