PowerEdge R515 Supported Drives

Internal drive bay and hot-plug backplane:
Up to 8 x 2.5” HDD: SAS, SATA, Near-line SAS SSD: SAS, SATA
Up to 8 x 3.5” HDD: SAS, SATA, Near-line SAS SSD: SAS, SATA

12 hard drive chassis: 2.5” or 3.5” SAS, SATA or SSD drives + 2 x 2.5” internal cabled hard drives 

Datasheet: R515 spec sheet 

PER515