Intel® Xeon® D-1541 8-core 2.1 GHz. Built-in dual-port 10GbE. 16 GB ECC DDR4 Up to 64 GB. Up to 40 drive bays with RX1217(RP). Securing your business assets. The 16-bay RS4021xs+ provides solid data security and lightening-fast performance with over 234K 4K random read IOPS and 6,258 MB/s sequential read throughput1. Together with its 8-core processor, ECC memory, advanced snapshot technology, and built-in 10GbE connectivity, the RS4021xs+ can support large multi-user environments while handling data-intensive workloads.. Engineered for service continuity. The RS4021xs+ ensures mission-critical data is always available, enabling businesses to deliver the best results, even in the face of disaster.. Redundant power. Dual PSUs provide protection against a PSU failure or accidental cord removal while hot-swappable fans can be replaced without powering down the system.. Maximize service availability. Synology High Availability (SHA) pairs two identical units together creating an active-passive cluster with minute-level failover.. Next-generation file system. Btrfs prevents data corruption and reduces maintenance overheads with advanced storage technologies and optimized snapshots. Customize to your business. The RS4021xs+ includes two PCIe slots for performance, networking, and storage upgrades enabling it to adapt to any business environment2.. Double bandwidth. Upgrade network bandwidth in minutes by 2x or more with Synology’s range of 10GbE NICs.. SSD cache3. Boost read/write IOPS by up to 16 times by enabling SSD cache with our Synology M.2 NVMe adapter cards and SNV3500 SSDs, or by installing one or more 2.5” SAT5200 SSDs.. Storage expansion. Quickly and easily scale up to 40 drives with two RX1217(RP) expansion units.. Hyper Backup. A comprehensive backup and recovery solution for securing data stored on Synology servers. Backup data locally, to another Synology device, rsync server, or cloud-based storage such as Google Drive, Dropbox, S3-compatible destinations,

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