Specifications
- Mfr Part Number: RS4021XS+
- Hardware:
- CPU: Intel Xeon D-1541 8-core (16-thread) 2.1 GHz, Turbo Boost up to 2.7 GHz
- Hardware encryption engine: Yes (AES-NI)
- Memory:Â 16 GB DDR4 ECC UDIMM (expandable up to 64 GB)
- Compatible Drive Bays: 16 x 3.5″ or 2.5″ SATA HDD/SSD (drives not included)Â
- Hot Swappable Drive: YesÂ
- External Ports:Â 2 x USB 3.2 Gen 1 ports; 2 x Expansion ports (Infiniband)
- Form Factor:Â Rackmount 3U
- LAN Ports:Â 4 x 1GbE RJ-45; 2 x 10GbE RJ-45
- Wake on LAN/WAN:Â YesÂ
- PCIe 3.0 slots: 2 x 8-lane x8 slots; Supports network interface cards and M.2 NVMe SSD adapter cards for SSD cache
- Scheduled Power On/Off:Â YesÂ
- System Fan: 3 x (80 x 80 x 32 mm)
- AC Input Power Voltage: 100V to 240V AC
- Power Frequency: 50/60 Hz, single phase
- Networking Protocols:Â SMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN (PPTP, OpenVPN, L2TP)
- File System:
- Internal Drives: Btrfs, ext4
- External Drives: Btrfs, ext4, ext3, FAT32, NTFS, HFS+, exFAT
- Storage management
- Maximum single volume size: 108/200 TB
- Maximum system snapshots: 65,536
- Maximum internal volumes: 256
- SSD cache
- Read/write cache support
- 2.5″ SATA SSD support
- M.2 NVMe SSD support
- File Sharing Capabilities:
- Max Local User Accounts: 16,000Â
- Maximum Local Groups: 512
- Max Shared Folders: 512
- Max Concurrent SMB/NFS/AFP/FTP Connections: 4,000
- Directory services: Connects with Windows AD/LDAP servers enabling domain users to login via SMB/NFS/AFP/FTP/File Station using their existing credentials.
- Security:Â Firewall, shared folder encryption, SMB encryption, FTP over SSL/TLS, SFTP, rsync over SSH, login auto block, Let’s Encrypt support, HTTPS (customizable cipher suite)Â
- Supported clients: Windows 7 onwards, macOSÂ 10.12 onwards
- Applications:
- Drive: Synchronizes files across Windows, macOS, Linux, Android and iOS. The built-in cross-platform portal allows access todata anytime and anywhere– Maximum number of hosted files: 5,000,000– Maximum number of concurrent connections for PC clients: 2,000
- File Station: Provides virtual drives, remote folders, Windows ACL editor, compression/extraction of archived files, bandwidth control for specific users/groups, creation of sharing links, and transfer logs
- FTP Server:Â Supports bandwidth control for TCP connections, custom FTP passive port ranges, anonymous FTP, FTP over TLS/SSL and SFTP protocols, network booting with TFTP and PXE support, and transfer logs
- Presto File Server:Â Enables high-speed data transfer over WAN through the exclusive SITA technology between Synology NAS and desktop
- iOS/Android applications: Synology Drive, Synology MailPlus, Synology Chat, Synology LiveCam, Moments, DS audio, DS photo, DS video, DS cam, DS file, DS finder, DS noteÂ
- Drive: Synchronizes files across Windows, macOS, Linux, Android and iOS. The built-in cross-platform portal allows access to
- Power Consumption:Â 145.79 W (Access); 62.68 W (HDD Hibernation)
- Certifications: FCC, CE, BSMI, VCCI, RCM, EAC, CCC, KC, UL
- Environment Safety: RoHS Compliant
- Package Contents:
- 1 x RS4021xs+ main unit
- 1 x Quick Installation Guide
- 1 x Accessory pack
- 2 x AC power cords
- Optional Accessories:Â
- DDR4 ECC UDIMM: D4EC-2666-16G
- RKS1317 Rail Kit
- 10GbE Network Interface Cards: E10G18-T2/E10G18-T1/E10G17-F2
- M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1
- M.2 SSD Adapter Card: M2D20
- M.2 NVMe SSDs: SNV3500
- 2.5″ SATA SSD: SAT5200
- 3.5″ SATA HDD: HAT5300
- Expansion Unit: RX1217(RP)
- VisualStation units: VS960HD, VS360HD
- Virtual DSM License Pack
- MailPlus License Pack
- Surveillance Device License Pack
- Dimensions (HxWxD):Â 132.3 x 482 x 656.5 mm (with server handles)
- Weight:Â 17.4 kg
- Warranty:Â 5 Years
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