The Synology HD6500 is a high-density 60-bay 4U rackmount NAS engineered for large-scale warm and cold storage applications including enterprise backups, video post-production, and surveillance deployments. Powered by dual 2.1 GHz Intel Xeon Silver 4210R 10-core processors with 64GB DDR4 ECC registered RAM (expandable to 512GB), delivering sequential read speeds up to 6688 MB/s and sequential write speeds up to 6662 MB/s. Features dual 10 Gigabit Ethernet and two Gigabit Ethernet ports with link aggregation and failover support. Built with dual redundant 1600W power supplies, hot-swappable 80mm fans, and out-of-band (OOB) management for remote troubleshooting. Supports 3.5" SAS-3 drives and 2.5" SATA III SSDs with flexible RAID configurations (0, 1, 5, 6, 10, Basic, JBOD) and AES-NI encryption. Expandable to 300 drive bays using up to four RX6022sas expansion units with SAS multipath connectivity for enhanced performance and redundancy. Features four PCIe Gen3 slots (two x16, two x8) for network and Fiber Channel upgrades. Running on DiskStation Manager (DSM) with Synology High Availability, Snapshot Replication (RPO as low as 5 minutes), Active Backup Suite, and Surveillance Station supporting up to 150 IP cameras with centralized management. Ideal for centralized backup repositories, large-scale surveillance, and multi-site data synchronization. Includes two 480GB SATA SSDs and rail kit, backed by a 5-year limited warranty.