---
name: "zpool-online"
section: "8"
platform: "linux"
package: "zfsutils-linux"
version: "2.3.9-0+deb13u1"
release: "Debian 13 (Trixie)"
platforms: ["linux", "freebsd"]
url: "https://new.carta.tech/zpool-online"
---

# zpool-online(8)

take physical devices offline in ZFS storage pool

## NAME

**zpool-offline** – take physical devices offline in ZFS storage pool

## SYNOPSIS

**zpool** **offline** \[**-****-power**\|\[**-****ft**\]\] *pool* *device*…

**zpool** **online** \[**-****-power**\] \[**-****e**\] *pool* *device*…

## DESCRIPTION

-

  **zpool** **offline** \[**-****-power**\|\[**-****ft**\]\] *pool* *device*… Takes the specified physical device offline. While the *device* is offline, no attempt is made to read or write to the device. This command is not applicable to spares.

  - **--power**

    Power off the device's slot in the storage enclosure. This flag currently works on Linux only

  - **-f**

    Force fault. Instead of offlining the disk, put it into a faulted state. The fault will persist across imports unless the **-t** flag was specified.

  - **-t**

    Temporary. Upon reboot, the specified physical device reverts to its previous state.

-

  **zpool** **online** \[**--power**\] \[**-e**\] *pool* *device*… Brings the specified physical device online. This command is not applicable to spares.

  - **--power**

    Power on the device's slot in the storage enclosure and wait for the device to show up before attempting to online it. Alternatively, you can set the **ZPOOL\_AUTO\_POWER\_ON\_SLOT** environment variable to always enable this behavior. This flag currently works on Linux only

  - **-e**

    Expand the device to use all available space. If the device is part of a mirror or raidz then all devices must be expanded before the new space will become available to the pool.

## SEE ALSO

[zpool-detach(8)](/zpool-detach/8.md), [zpool-remove(8)](/zpool-remove/8.md), [zpool-reopen(8)](/zpool-reopen/8.md), [zpool-resilver(8)](/zpool-resilver/8.md)