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| .Dd May 29, 2021 |
| .Dt ZPOOL-REPLACE 8 |
| .Os |
| . |
| .Sh NAME |
| .Nm zpool-replace |
| .Nd replace one device with another in ZFS storage pool |
| .Sh SYNOPSIS |
| .Nm zpool |
| .Cm replace |
| .Op Fl fsw |
| .Oo Fl o Ar property Ns = Ns Ar value Oc |
| .Ar pool Ar device Op Ar new-device |
| . |
| .Sh DESCRIPTION |
| Replaces |
| .Ar device |
| with |
| .Ar new-device . |
| This is equivalent to attaching |
| .Ar new-device , |
| waiting for it to resilver, and then detaching |
| .Ar device . |
| Any in progress scrub will be cancelled. |
| .Pp |
| The size of |
| .Ar new-device |
| must be greater than or equal to the minimum size of all the devices in a mirror |
| or raidz configuration. |
| .Pp |
| .Ar new-device |
| is required if the pool is not redundant. |
| If |
| .Ar new-device |
| is not specified, it defaults to |
| .Ar device . |
| This form of replacement is useful after an existing disk has failed and has |
| been physically replaced. |
| In this case, the new disk may have the same |
| .Pa /dev |
| path as the old device, even though it is actually a different disk. |
| ZFS recognizes this. |
| .Bl -tag -width Ds |
| .It Fl f |
| Forces use of |
| .Ar new-device , |
| even if it appears to be in use. |
| Not all devices can be overridden in this manner. |
| .It Fl o Ar property Ns = Ns Ar value |
| Sets the given pool properties. |
| See the |
| .Xr zpoolprops 7 |
| manual page for a list of valid properties that can be set. |
| The only property supported at the moment is |
| .Sy ashift . |
| .It Fl s |
| The |
| .Ar new-device |
| is reconstructed sequentially to restore redundancy as quickly as possible. |
| Checksums are not verified during sequential reconstruction so a scrub is |
| started when the resilver completes. |
| Sequential reconstruction is not supported for raidz configurations. |
| .It Fl w |
| Waits until the replacement has completed before returning. |
| .El |
| . |
| .Sh SEE ALSO |
| .Xr zpool-detach 8 , |
| .Xr zpool-initialize 8 , |
| .Xr zpool-online 8 , |
| .Xr zpool-resilver 8 |