The Synology DS1522+ is a versatile 5-bay NAS solution that is easy to scale and expand as your needs change, with optional support for up to 15 drives, fast networking, and NVMe SSD caching. Powered by Synology DiskStation Manager (DSM), it offers a flexible all-in-one solution for data sharing, synchronization, backup, and surveillance.

Features

Dependable Performance

Up to 736/796 MB/s sequential read/write throughput makes file operations quick and efficient

Versatile Network Storage

Leverage built-in file and photo management, data protection, virtualization, and surveillance solutions

Fast and Stable Connectivity

Four 1GbE ports for simple integration into existing environments with optional 10GbE connectivity to tackle more specialized, bandwidth-heavy applications

Easy Capacity Expansion

Add up to 10 extra drive bays with 2 DX517 expansion units for a maximum of 15 storage drives

Specifications

Hardware

CPU: AMD Ryzen™ R1600 dual-core (4-thread) 2.6 GHz, max. boost clock up to 3.1 GHz
Hardware encryption engine: AES-NI
Memory: 8 GB DDR4 ECC SODIMM (expandable up to 32 GB)
Compatible drive types:
- 5 x 3.5" or 2.5" SATA HDD/SSD (drives not included)
- 2 x M.2 2280 NVMe SSD (drives not included)
- Synology only guarantees full functionality, reliability, and performance for Synology drives listed on the compatibility list6
Hot swappable drives: Yes
External ports:
- 2 x USB 3.2 Gen 1 ports
- 2 x Expansion ports (eSATA)
Form factor: Desktop
Size (HxWxD): 166 x 230 x 223 mm
Weight: 2.7 kg
LAN ports: 4 x 1GbE RJ-45
Wake on LAN/WAN: Yes
Network expansion: Supports E10G22-T1-Mini 10GbE RJ-45 Network Upgrade Module2
Scheduled power on/off: Yes
System fans: 2 x (92 x 92 x 25 mm)
AC input power voltage: 100 V to 240 V AC
Power frequency: 50/60 Hz, single phase
Operating environment:
- Temperature: 0°C to 40°C (32°F to 104°F)
- Relative humidity: 5% to 95% RH
Storage environment:
- 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 Specifications

Networking protocols: SMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, and VPN (PPTP, OpenVPN™, L2TP)
File systems:
- Internal: Btrfs, ext4
- External: Btrfs, ext4, ext3, FAT32, NTFS, HFS+, exFAT
Supported RAID types: Synology Hybrid RAID (SHR), Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10
Storage management:
- Max. single volume size: 108 TB
- Max. number of system snapshots: 65,53611
- Max. number of internal volumes: 64
SSD cache:
- Read/write cache support
- M.2 NVMe and 2.5" SATA SSD support
File sharing capabilities:
- Maximum local user accounts: 2,048
- Maximum local groups: 256
- Maximum shared folders: 512
- Maximum concurrent SMB/NFS/AFP/FTP connections: 2,000
Privileges: Windows® Access Control List (ACL) and application privileges
Directory services: Connects with Windows® AD/LDAP servers enabling domain users to login via SMB/NFS/AFP/FTP/File Station using their existing credentials
Virtualization: VMware vSphere®, Microsoft Hyper-V®, Citrix®, OpenStack, and Kubernetes
Security: Firewall, shared folder encryption, SMB encryption, FTP over SSL/TLS, SFTP, rsync over SSH, login auto block, Let's Encrypt support, and HTTPS (customizable cipher suite)
Supported browsers: Google Chrome®, Firefox®, Microsoft Edge®, Safari® 13 and later, and Safari (iOS 13.0 and later) on iPad, Chrome (Android™ 11.0 and later) on tablets
Interface languages: English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svensk, Nederlands, ???????, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, ?eský

Packages and Applications
File Server & Synchronization

Drive:
- Synchronizes files across Windows®, macOS®, Linux®, Android™, and iOS. The built-in cross-platform portal allows access to data anytime and anywhere
- Max. number of hosted files: 5,000,000
- Max. number of concurrent connections for PC clients: 350
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
Hybrid Share: Efficiently synchronizes files across sites by keeping shared data on Synology C2 Storage and streaming files to Synology NAS worldwide on request. Frequently requested files are cached at each site for low-latency access
FTP Server: 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: Enables high-speed data transfer over WAN between Synology NAS and desktop platforms through the exclusive SITA technology
Cloud Sync: Offers one or two-way synchronization with public cloud storage providers including Alibaba Cloud OSS, 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: Search through files, metadata, and more on your NAS. Integration with Windows Search and macOS Spotlight makes it easyto find files
Migration Assistant Migrates data, system setting, and applications seamlessly from one Synology NAS to another to ensure maximum service availability

SAN Storage & Virtualization

SAN Manager
- Max. number of iSCSI targets: 128
- Max. number of LUNs: 256
- LUN clone/snapshot support
Virtual Machine Manager: Supports running Windows®, Linux®, and Virtual DSM-based virtual machines on Synology NAS

Data Protection & Backup Solutions

Hyper Backup: Supports local backup, network backup, and data backup to other devices, Synology NAS, and public clouds including C2 Storage
Backup tools:
- DSM configuration backup, macOS® Time Machine® support, Synology Drive Client desktop application
- Shared folder sync supports a maximum of 32 tasks
Snapshot Replication
- Maximum number of snapshots for shared folders: 1,024
- Maximum number of replications: 32
Synology High Availability: Reduces service downtime by combining two identical NAS into a high-availability cluster
Active Backup for Business: An all-in-one backup solution designed for heterogeneous business IT environments. It enables IT admins to remotely manage and protect PCs, servers, Synology systems, and VMs from one centralized console
Active Backup for Google Workspace: Supports backup and restoration of Google Workspace My Drive, Team Drive, Gmail, Contacts, and Calendar
Active Backup for Microsoft 365: Supports backup and restoration of Microsoft 365 OneDrive for Business, Outlook, Contacts, and Calendar

Productivity & Collaboration

Collaboration tools:
- Collaborate with instant messaging service Synology Chat, online documents editor Synology Office, and scheduling assistant Synology Calendar
  - Max. number of concurrent users for Chat: 100
  - Max. number of users for Office: 1,200
  - Calendar supports CalDAV and access via mobile devices
Note Station: A note taking platform that supports rich text, note organization and versioning, encryption, sharing, media embedding, and attachments
Synology MailPlus Server: A secure, reliable, and private mail solution featuring high-availability, load balancing, security, and filtering options
Synology MailPlus: An intuitive webmail interface for Synology MailPlus Server with configurable mail labels, filters, and user interface

Multimedia

Synology Photos: An efficient photo management solution for professional and amateur photographers. Automated tools allow users to group filter, organize, and share content while keeping their photos safe and secure
Other packages: Video Station, Audio Station, and iTunes® Server

Surveillance

Surveillance Station: Maximum IP cameras: 40, for a total of 1200 FPS at 720p (H.264)

Management & Administration

Synology Directory Server: Provides a flexible and cost-effective domain controller solution
Central Management System: Provides a single interface to manage and monitor multiple Synology NAS
VPN Server:
- Maximum connections: 40
- Supported VPN protocols: PPTP, OpenVPN™, L2DTP/IPSec
Active Insight: Monitor health statistics, login activity, and backup statuses for your Synology servers worldwide, and receive notifications and advice from our centralized cloud-hosted management platform
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
Web Station: Enables hosting for up to 30 websites with support for PHP/MariaDB® and 3rd-party applications
Other packages: DNS Server, RADIUS Server, and Log Center

Others

iOS/Android™ applications: Synology Drive, Synology MailPlus, Synology Secure SignIn, Synology Chat, Synology LiveCam, Synology Active Insight, DS cam, DS file, DS finder, and DS note
Other packages: Additional 3rd-party packages are available in the Package Center

Environment and Packaging