The total storage capacity of a static volume can be expanded by adding one or more additional disks to a RAID group in the static volume. This extra capacity can be added online, without any interruption to data access.
Adding disks to a RAID 1 group changes the RAID type of the group to RAID 5.
To expand a RAID 50 or RAID 60 group, every sub-group must be expanded with the same number of disks.
QTS starts rebuilding the RAID group. The storage capacity of the volume increases after RAID rebuilding is finished.