Hardware

• CPU: AMD RyzenTM V1500B quad-core 2.2 GHz
• Hardware encryption engine: Yes (AES-NI)
• Memory: 4 GB DDR4 ECC SODIMM (expandable up to 32 GB)
• Compatible drive type: 8 x 3.5" or 2.5" SATA HDD/SSD (drives not included)
• Hot swappable drive: Yes
• External port:
  - 2 x USB 3.2 Gen 1 ports
  - 1 x Expansion port (eSATA)
• Form factor: Rackmount 2U
• Size (HxWxD): RS1221+: 88 x 482 x 306.6 mm (with server handles)
• Weight: RS1221+: 6.9 kg
• Rack installation support: RS1221+: 2-post 19" rack (direct mounting), 4-post 19" rack
• LAN ports: 4 x 1GbE RJ-45
• Wake on LAN/WAN: Yes
• PCIe 3.0 slot:
  - 1 x 4-lane x8 slot
  - Supports network interface cards2 and M.2 NVMe SSD adapter cards for SSD cache
• Scheduled power on/off: Yes
• System fans: 2 x (80 x 80 x 25 mm)
• AC input power voltage: 100 V to 240 V AC
• Power frequency: 50/60 Hz, single phase
• Operating temperature: 0°C to 35°C (32°F to 95°F)
• Storage temperature: -20°C to 60°C (-5°F to 140°F)
• Relative humidity: 5% to 95% RH
• Maximum operating altitude: 5,000 m (16,400 ft)

General DSM Specification

• Networking protocol: SMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN (PPTP, OpenVPN™, L2TP)
• File system:
  - Internal: Btrfs, ext4
  - External: Btrfs, ext4, ext3, FAT32, NTFS, HFS+, exFAT9
• Supported RAID type: Synology Hybrid RAID (SHR), Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10
• Storage management:
  - Maximum single volume size: 108 TB
  - Maximum of system snapshots: 65,536
  - Maximum internal volumes: 64
• SSD cache:
  - Read-write cache support
  - 2.5" SATA SSD support
  - M.2 NVMe SSD support
• File sharing capability:
  - Maximum local user accounts: 2,048
  - Maximum local groups: 256
  - Maximum shared folders: 512
  - Maximum concurrent SMB/NFS/AFP/FTP connections: 1,000
• Privilege: Windows Access Control List (ACL), application privilege
• Directory service: Connects with Windows® AD/LDAP servers enabling domain users to login via SMB/NFS/AFP/FTP/File Station using theirexisting credentials
• Virtualisation: VMware vSphere® 6.5, Microsoft Hyper-V®, Citrix®, OpenStack®
• Security: Firewall, shared folder encryption, SMB encryption, FTP over SSL/TLS, SFTP, rsync over SSH, login auto block, Let's Encryptsupport, HTTPS (customizable cipher suite)
• Supported client: Windows® 7 onwards, macOS® 10.12 onwards
• Supported browser: Chrome®, Firefox®, Edge®, Internet Explorer® 10 onwards, Safari® 10 onwards, Safari (iOS 10 onwards), Chrome (Android™ 6.0onwards) on tablets
• Interface Language: English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svensk, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český and more.

Packages and 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: 1,000,000
  - Maximum number of concurrent connections for PC clients: 550
• File Station: Provides virtual drives, remote folders, Windows® ACL editor, compression/extraction of archived files, bandwidth control forspecific users/groups, creation of sharing links, and transfer logs.
• FTP Server: Supports bandwidth control for TCP connections, custom FTP passive port ranges, anonymous FTP, FTP over TLS/SSL andSFTP protocols, network booting with TFTP and PXE support, and transfer logs.
• Presto File Server: Enables high-speed data transfer over WAN through the exclusive SITA technology between Synology NAS and desktop
• Cloud Sync: Offers one or two-way synchronization with public cloud storage providers including Alibaba Cloud OSS, Amazon S3-compatible storage, Backblaze B2, Baidu Cloud, Box, Dropbox, Google Cloud Storage, Google Drive, hubiC, MegaDisk,Microsoft OneDrive, OpenStack Swift-compatible storage, Tencent COS, WebDAV servers and Yandex Disk.
• Universal Search: Enables global search of applications and files
• iSCSI Manager:
  - Maximum iSCSI target: 128
  - Maximum iSCSI LUN: 256
  - iSCSI LUN clone/snapshot support
• Virtual Machine Manager: Deploy and run various virtual machines on Synology NAS, including Windows, Linux, or Virtual DSM
• Hyper Backup: Support local backup, network backup, and backup data to public clouds
• Backup tools:
  - DSM configuration backup, macOS® Time Machine® support, Synology Drive Client desktop application
  - Shared folder sync supports a maximum of 16 tasks
• Snapshot Replication:
  - Maximum shared folder snapshots: 1,024
  - Maximum replications: 32
• Synology High Availability: Reduce service downtime by setting up two identical NAS into one high-availability cluster
• Active Backup for G Suite: Supports backup and restoration of Google Workspace My Drive, Team Drive, Gmail, Contacts, and Calendar.
• Active Backup for Office 365: Supports backup and restoration of Microsoft 365 OneDrive for Business, mail, contacts, and calendar.
• Active Backup for Business: An all-in-one backup solution designed for heterogeneous business IT environments. It enables IT admins to remotelymanage and protect PCs, servers, and VMs from one centralized console.
• Collaboration tools: Users can collaborate through the instant messaging service Synology Chat, the online editor Synology Office, and thescheduling assistant Synology Calendar:
  - Chat maximum user: 1,500
  - Office maximum user: 1,800
  - Calendar: support CalDAV and access via mobile devices
• Note Station: A note taking platform that supports rich text, note organization and versioning, encryption, sharing, media embedding, andattachments
• MailPlus Server: A secure, reliable, and private mail solution featuring high-availability, load balancing, security, and filtering
• MailPlus: An intuitive webmail interface for Synology MailPlus Server with customizable mail labels, filters, and user interface.
• Moments: A feature-rich photo management application that includes AI-powered album creation from facial and subject recognition,photo editing and sharing capabilities, similar photo detection for duplicate management, auto-editing functions such ascolor correction and angle adjustments, and auto-selection of the best shots. Mobile applications are available on iOS andAndroid™ devices
• Other packages: Video Station, Photo Station, Audio Station, iTunes® Server
• Surveillance Station: Maximum IP cameras: 40 (total of 1,200 FPS at 720p, H.264)
• Synology Directory Server: Provide a flexible and cost-effective domain controller solution
• CMS: Provides a single interface to manage and monitor multiple Synology NAS
• VPN Server: Maximum connections: 30, Supported VPN protocols: PPTP, OpenVPN™, L2TP/IPSec
• Mail Server:
  - Supported Mail Server protocols: POP3, SMTP, IMAP
  - LDAP/AD account support
• Mail Station: A webmail interface for Mail Server to receive emails from multiple POP3 mailboxes and SMTP servers.
• Web Station: Enables hosting for up to 30 websites with support for PHP/MariaDB® and 3rd-party applications.
• Other packages: DNS Server, RADIUS Server, Log Center
• Storage Analyzer: Displays volume and quota usage, total size of files, volume usage and trends based on past usage, size of shared folders,large files, most recently modified files, and least recently accessed files.
• Antivirus Essential: Provides full system scans, scheduled scans, white list customization, and auto-update of virus definitions.
• iOS/Android™ applications: Synology Drive, Synology MailPlus, Synology Chat, Synology LiveCam, Moments, DS audio, DS photo, DS video, DS cam, DSfile, DS finder, DS note
• Other packages: Additional 3rd-party packages are available in the Package Center.

Environment and Packaging

• Environment safety: RoHS compliant
• Package content:
  - RS1221+ main unit x 1
  - Quick Installation Guide x 1
  - Accessory pack x 1
  - 1 x normal cable and 1 x C13 to C14 cable (RS1221+)
• Optional accessories:
  - DDR4 ECC SO-DIMM: D4ES01-4G/D4ES01-8G/D4ECSO-2666-16G
  - 10GbE Network Interface Card: E10G18-T2/E10G18-T1/E10G17-F2
  - M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1
  - M.2 SSD Adapter Card: M2D20
  - 2.5" SATA SSD: SAT5200
  - M.2 NVMe SSD: SNV3400, SNV35008
  - Expansion Unit: RX418
  - Rail Kit (RS1221+): RKM114, RKS1317
  - VisualStation: VS960HD/VS360HD
  - MailPlus License Pack4
  - Surveillance Device License Pack5
  - Virtual DSM License Pack
• Warranty: 3 years