Use this action to add additional storage to your existing pool. The verification step is identical to the verification step during initial configuration. The storage must be added using the same profile that was used to configure the pool initially. If there is insufficient storage to configure the system with the current profile, some attributes can be sacrificed. For example, adding a single JBOD to a double parity RAID-Z NSPF config makes it impossible to preserve NSPF characteristics. However, you can still add the JBOD and create RAID stripes within the JBOD, sacrificing NSPF in the process.