Sans Digital EliteSTOR 24 Bay 6G SAS/SATA to SAS JBOD with SAS Expander Rackmount (ES424X6+BS) 6G SAS Expander Technology - Connect 24 SAS or SATA drives with only one single SFF-8088 to 8088 Mini-.SAS cable to HBA (Host Bus Adapter). Superior Performance - With support of SATA 6G or SAS 6G hard drives and 24 GBps bandwidth, performance can reach over 1700 MB/s in read and 1500 MB/s in write. Staggering Spin-Up - Built-in staggering spin-up for hard drives during power up. Thus, extending the life / duty cycle of the hard drives and power supply. Support Industry Standard SGPIO - Serial General Purpose Input/Output (SGPIO) is utilized to provide the hard drives health & enclosure real-time information via the mini-SAS connection cable to the HBA (host Bus Adapter) without additional serial cable. Scalability - Supports up to 5 enclosures or up to 120 hard drives daisy-chained together for capacity expansion. Multi-purposes - Supports both SAS (Serial SCSI) and SATA hard drives to meet the requirements of different applications with different price/performance characteristics. System Status - System status can be easily monitored by the status LED and audible alarm alert. All hardware is included - Mini-SAS cable, cooling fan, tray modules and build-in mounting rail are included. By connecting to a SAS controller and hard drives will instantly increase the storage space.