You can use Storage Manager to create and manage the space on your DiskStation by creating different types of storage, including volumes, Disk Groups, iSCSI LUNs, and iSCSI Targets.
Get the basic guide of RAID, volumes, and Disk Group supported by Synology DiskStation
Create, set up, and manage volumes on DiskStation
Create, set up, and manage Disk Groups on DiskStation
Manage cache support or run S.M.A.R.T. analysis for your hard disks
Create, set up, and manage iSCSI LUNs on DiskStation
Create, set up, and manage iSCSI Targets on DiskStation
Assign and manage hot spare disks.
Mount, remove, and check compatibility of SSD (Solid State Drive) Cache.