Create a RAID3 device. The last given component will contain parity data, whilst the others will all contain regular data. The number of components must be equal to 3, 5, 9, 17, etc. (2^n + 1).
Additional options include:
-h
Hardcode providers’ names in metadata.
-n
Turn off autosynchronization of stale components.
-r
Use parity component for reading in round-robin fashion. Without this option the parity component is not used at all for reading operations when the device is in a complete state. With this option specified random I/O read operations are even 40% faster, but sequential reads are slower. One cannot use this option if the -w option is also specified.
-w
Use verify reading feature. When reading from a device in a complete state, also read data from the parity component and verify the data by comparing XORed regular data with parity data. If verification fails, an EIO error is returned and the value of the kern.geom.raid3.stat.parity_mismatch sysctl is increased. One cannot use this option if the -r option is also specified.
clear
Clear metadata on the given providers.
configure
Configure the given device.
Additional options include:
-a
Turn on autosynchronization of stale components.
-d
Do not hardcode providers’ names in metadata.
-h
Hardcode providers’ names in metadata.
-n
Turn off autosynchronization of stale components.
-r
Turn on round-robin reading.
-R
Turn off round-robin reading.
-w
Turn on verify reading.
-W
Turn off verify reading.
rebuild
Rebuild the given component forcibly. If autosynchronization was not turned off for the given device, this command should be unnecessary.
insert
Add the given component to the existing array, if one of the components was removed previously with the remove command or if one component is missing and will not be connected again.
Additional options include:
-h
Hardcode providers’ names in metadata.
remove
Remove the given component from the given array and clear metadata on it.
