Replace one device with another in a ZFS storage pool
- Replaces old_device with
new_device. This is equivalent to attaching
new_device, waiting for it to resilver, and then
detaching old_device. Any in progress scrub will be
The size of new_device must be greater
than or equal to the minimum size of all the devices in a mirror or
new_device is required if the pool is
not redundant. If new_device is not specified, it
defaults to old_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
/dev path as the old device, even though it is
actually a different disk. ZFS recognizes this.
- Forces use of new_device, even if it appears to
be in use. Not all devices can be overridden in this manner.
- Sets the given pool properties. See the zpoolprops
manual page for a list of valid properties that can be set. The only
property supported at the moment is ashift.
- The new_device is reconstructed sequentially to
restore redundancy as quickly as possible. Checksums are not verfied
during sequential reconstruction so a scrub is started when the
resilver completes. Sequential reconstruction is not supported for
- Waits until the replacement has completed before returning.