Accommodate massive storage growth with this Synology RX1222SAS expansion unit. It offers 12 bays for up to 84 additional 3.5"/2.5" SAS/SATA drives when connected to up to seven Synology RX1222SAS expansion units. Add volumes seamlessly without interrupting services, thanks to Synology DiskStation Manager (DSM)'s online volume expansion and advanced volume management options. Setup is easy: connect the RX1222SAS via the included expansion cable and manage the additional storage in minutes using Storage Manager and other intuitive DSM tools. Online volume expansion allows for adding new volumes or expanding existing RAID volumes without reformatting drives. Achieve high reliability with Synology's SAS and SATA enterprise drives, backed by extensive testing for maximum integration and optimal performance. Designed for service uptime, the RX1222SAS features hot-swappable drive trays, fans, and power supplies to minimize maintenance impact. Redundant power supply units ensure your system remains online even if one power source fails. Synology Replacement Service (SRS) offers free advance replacement units in selected regions to maximize service uptime for mission-critical storage and ensure business continuity.