Flexible data management for homes and small businessThe 5-bay Synology DiskStation DS1522+ is easy to scale and expand as your needs change, with optional support for up to 15 drives, 10GbE 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.  ThroughputOver 736/796 MB/s sequential read/write1
8 GB DDR4 ECC (max. 32 GB) Memory Four built-in 1GbE ports with easy 10GbE option2 Connectivity Up to 15 drive bays with 2 DX517 expansion units2 Scalability A trademark of Ziff Davis, LLC. Used under license.Reprinted with permission. © 2024 Ziff Davis, LLC. All Rights Reserved. Synology has won the Readers' Choice & Business Choice for best NAS devices in 2024 from PCMag. This is the 13th consecutive year Synology has won the Readers' Choice award and 10th overall win for Business Choice award. Simply fasterDS1522+ can handle more demanding application workloads and a greater number of concurrent users compared to prior-generation systems. Experience faster file indexing in Synology Drive, photo organization in Photos, and concurrent file transfers. Synology Drive
24%
faster file indexingSynology Photos
25%
faster photo indexingMultiple file transfers
32%
faster random writeFlexible networking optionsReduce transfer times with the DS1522+, designed to accelerate your workloads. Easily add faster networking and NVMe drives to further boost performance. Up to 736/796 MB/s read/write Up to 10GbE networking 2 x M.2 NVMe cache & storage pool Everything you need for your home officeMake the most of high-performance networking and file access without taking up unnecessary space. DS1522+ comes equipped with 5 bays and can scale up to 15 bays with 2 DX517 expansion units as your data needs grow. 5 bays 80 TB
15 bays 240 TB Store, share, and protectManage all your documents, photos, and other files, back up applications and devices, or protect your assets with professional video surveillance.  File Server Multi-Layered Backup
 Smart Surveillance
File ServerStore and access files from all your devices, and protect them with smart versioning. Sort, manage, share, and sync your data across locations. A private cloud for all your devicesStore, sync, and access data from any device, wherever you are with Synology’s private cloud solution. Sync data between different platforms and devices, and access your files through mobile apps, desktop clients, and a browser-based interface. Leverage smart versioning to back up important data via desktop and mobile applications. Dependable and secure network storageUse shared folders on your Synology device as reliable storage available from anywhere on your local network over all common protocols (SMB/NFS/WebDAV/FTP). Protect your files against accidental changes and removal or even malware attacks with built-in snapshot technology and other backup options.  Sort, manage, and share your filesRely on our file, photo, and multimedia management apps to sort your data by metadata, filters, and labels. Safely share files and folders with family, colleagues, or business customers thanks to granular access and sharing permissions. Create convenient sharing links and secure shared files with expiration dates and individual passwords. Let friends or clients review photos remotely and give easy feedback through star ratings. Sync files and folders between sitesBenefit from two efficient ways to keep files and folders synchronized between different locations — such as your home and your business, or teams in different countries. Sync folders one or two-way between Synology devices using Synology Drive ShareSync, a free site-to-site solution. Or choose to leverage our secure data centers to store your data in the cloud, while keeping a cache of frequently accessed or manually pinned files on your DS1522+ with Synology Hybrid Share. Such hybrid cloud storage lets you access data at LAN speeds without being limited by your local storage size or bandwidth. Multi-Layered BackupBack up files, folders, physical devices, VMs, and SaaS applications with free solutions, and protect your NAS with built-in technologies. Protect full endpoints, servers, and VMsSecurely back up Windows clients and servers, Linux endpoints, VMware® and Hyper-V® virtual machines, and other Synology devices. Leverage built-in deduplication technology to greatly reduce backup sizes and multi-versioning restore systems to a time point of your choice. Make local backups of your cloud appsProtect business Microsoft 365 and Google Workspace accounts by maintaining complete offline copies of your crucial information and configurations with Active Backup for Microsoft 365 and Active Backup for Google Workspace. Back up documents and multimediaSet up backup tasks to protect important folders on your PC and macOS device with Synology Drive. On your mobile device, automatically save another copy of the photos and videos you take, and easily organize and share them through Synology Photos. Back up your NAS to multiple destinationsProtecting the data on your Synology system, and your server itself, means storing frequent emergency copies to multiple locations. Built-in tools in Synology DSM let you efficiently back up files, folders, or your entire system from your device to remote servers, external drives, or Synology and third-party cloud storage, with space-saving deduplication technology reducing total backup sizes, and customizable backup and retention schedules for maximum flexibility. High-frequency protection with snapshotsTake point-in-time snapshots of shared folders and LUNs at intervals of down to 5 minutes to protect against data loss, accidental deletion, or malware attacks. Set a custom retention schedule and roll back files and VMs to a version that is unaffected. Smart SurveillanceTransform your Synology device into a full-featured video management system for a wide range of compatible IP cameras. Wide compatibilityConnect up to 40 IP cameras from a selection of over 8,300 validated models thanks to wide camera compatibility and ONVIF support in Synology Surveillance Station. Secure and privateFootage stored locally can be protected from unauthorized access by industry-standard AES-256 encryption. 24/7 everywhere accessMonitor live streams or watch recordings from web browser, desktop client, or the DS cam mobile app.  |
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DSM Specifications
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| Maximum Single Volume Size | 108 TB | |
| Maximum Internal Volume Number | 64 | |
| M.2 SSD Storage Pool Support* | ||
| SSD Read/Write Cache (Determining cache size) | ||
| SSD TRIM | ||
| Supported RAID Type |
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| RAID Migration |
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| Volume Expansion with Larger HDDs |
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| Volume Expansion by Adding a HDD |
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| Global Hot Spare Supported RAID Type |
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| Notes |
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| Internal Drives |
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| External Drives |
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| File Protocol |
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| Maximum Concurrent SMB/AFP/FTP Connections | 2,000 | |
| Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion) | 2,000 | |
| Windows Access Control List (ACL) Integration | ||
| NFS Kerberos Authentication | ||
| Notes |
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| Maximum Local User Accounts | 2,048 | |
| Maximum Local Groups | 256 | |
| Maximum Shared Folder | 512 | |
| Maximum Shared Folder Sync Tasks | 32 | |
| Hybrid Share Folder Number | 10 | |
| Folder and Package Backup | ||
| Entire System Backup | ||
| Notes | Full-system backup requires DSM 7.2 or later. | |
| Synology High Availability | ||
| Syslog Events per Second | 800 | |
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Virtualization
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VMware ESXi 6.5 and VAAI | |
| Windows Server 2022 | ||
| Citrix Ready | ||
| OpenStack | ||
| Supported Protocols | SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV | |
| Supported Browsers |
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| Supported Language | English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文 | |
| Notes | For an updated list of supported browser versions, check the DSM Technical Specifications. | |
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Add-on Packages view the complete package list
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| Suggested Users | 100 | |
| Notes |
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Download Station
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Maximum Concurrent Download Tasks | 80 |
| Maximum iSCSI Target Number | 128 | |
| Maximum LUN | 256 | |
| LUN Clone/Snapshot, Windows ODX | ||
| Free Email Accounts | 5 (Additional accounts require purchase of licenses) | |
| Suggested Users | 500 | |
| Maximum Server Performance | 1,224,000 emails per day, approx. 37GB | |
| Notes |
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| DLNA Compliance | ||
| Facial Recognition | ||
| Object Recognition | ||
| Maximum Snapshots per Shared Folder | 1,024 | |
| Maximum of System Snapshots | 65,536 | |
| Default Licenses | 2 (Additional cameras require purchase of licenses) | |
| Suggested Maximum IP Cameras and Total FPS (H.264) |
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| Suggested Maximum IP Cameras and Total FPS (H.265) |
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| Notes |
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| Recommended Number of Concurrent Sync Clients | 350 (the number of connections that can be maintained when the recommended number of hosted files was reached) | |
| Recommended Number of Hosted Files | 5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) | |
| Notes |
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| Suggested Users | 3,000 | |
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| Recommended Virtual Machine Instances | 4 (Learn more) | |
| Recommended Virtual DSM Number (Licenses required) | 4 (including 1 Free License) | |
| Notes | The specifications vary depending on system configuration and memory size. | |
| Maximum Connections | 40 | |
| NAS | |
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| Compatible Drive Type | 3.5 |
| CPU Architecture | 64-bit |
| CPU Core | 2 |
| CPU Frequency | 2.6 (base) / 3.1 (turbo) GHz |
| CPU Model | AMD Ryzen R1600 |
| CPU Quantity | 1 |
| Drive Bays | 5 |
| Expansion Port | 2 |
| Hardware Encryption Engine | YES |
| Hot Swappable Drive | YES |
| M.2 Drive Slots | 2 (NVMe) |
| Maximum Memory Capacity | 64 GB (32 GB x 2) |
| Memory | 8 GB DDR4 ECC SODIMM |
| PCIe Expansion | 1 x Gen3 x2 network upgrade slot |
| Power Supply Unit / Adapter | 120 watts 100V to 240V AC 50/60 Hz, Single Phase |
| RJ-45 1GbE LAN Port | 4 |
| RJ-45 1GbE LAN Port | 2 |
| System Fan | 92 mm x 92 mm x 2 pcs |
| Total Memory Slots | 2 |
