Partial Reconstruction tool dedicated to considerable reduction of RAID restoring time in case when drive removing and going back.
That sort of situations has following reasons:
1. Administrator misstep.
2. Necessity to drive relocation from one JBOD to another without system shutdown.
User can deactivate entire JBOD, as example for rearrangement, if total number of drives in array less than acceptable amount of disks for failure. That is why Partial Reconstruction is very effective for large-volume (high capacity) data arrays.