Dell PERC H740P RAID1 to RAID5 reconfigure

Story in screenshots how I converted a Dell PowerEdge R740xd's RAID1 2 x 3.5TB to RAID5 6 x 3.5TB config. The process took 30 hours (SSD, probably would be more horror with HDD), but no dataloss. After 100% reconstruction the extra space became available on vsphere center esxi level via rescan storage and increase datastore capacity