With 60 drive bays in a 4 RU rackmount enclosure, the HD6500 60-Bay Rackmount NAS Enclosure from Synology is a high-density storage solution for large-scale warm and cold storage applications such as full system backups, video post-production, and large surveillance deployments, thanks to sequential read speeds of up to 6688 MB/s and sequential write speeds of up to 6622 MB/s. Built with 60 drive bays that can accommodate 3.5" SAS-3 hard drives and 2.5" SATA III SSDs, the SA3610's storage can be expanded to have 300 total drive bays using four optional RX6022sas expansion units.