DSM Specifications |
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Maximum Single Volume Size |
108 TB
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Maximum Internal Volume Number |
64
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M.2 SSD Storage Pool Support* |
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SSD Read / Write Cache (White Paper) |
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SSD TRIM |
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Supported RAID Type |
- Synology Hybrid RAID
- Basic
- JBOD
- RAID 0
- RAID 1
- RAID 5
- RAID 6
- RAID 10
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RAID Migration |
- Basic to RAID 1
- Basic to RAID 5
- RAID 1 to RAID 5
- RAID 5 to RAID 6
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Volume Expansion with Larger HDDs |
- Synology Hybrid RAID
- RAID 1
- RAID 5
- RAID 6
- RAID 10
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Volume Expansion by Adding a HDD |
- Synology Hybrid RAID
- JBOD
- RAID 5
- RAID 6 (with Expansion Unit)
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Global Hot Spare Supported RAID Type |
- Synology Hybrid RAID
- RAID 1
- RAID 5
- RAID 6 (with Expansion Unit)
- RAID 10 (with Expansion Unit)
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Notes |
- Creating M.2 storage pools requires the use of Synology-verified SSDs, which are rigorously tested under extreme temperature conditions. Thermal parameters for SSDs and NAS units are fine-tuned to ensure optimal management of thermal conditions under I/O-intensive environments. (Learn more)
- Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
- Actual maximum storage pool and volume sizes vary depending on drives used, the number of drive bays available, and the RAID configuration.
- Each internal volume (may consist of multiple drives) is expandable up to 108TB.
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File Protocol |
SMB/AFP/NFS/FTP/WebDAV
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Maximum Concurrent SMB/AFP/FTP Connections |
1,000
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Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion) |
2,000
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Windows Access Control List (ACL) Integration |
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NFS Kerberos Authentication |
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Notes |
- Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM.
- The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed.
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Maximum Local User Accounts |
2,048
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Maximum Local Groups |
256
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Maximum Shared Folder |
512
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Maximum Shared Folder Sync Tasks |
16
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Hybrid Share Folder Number |
10
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Folder and Package Backup |
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Entire System Backup |
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Notes |
Full-system backup requires DSM 7.2 or later.
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Synology High Availability |
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Syslog Events per Second |
800
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Virtualization |
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Virtualization
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VMware ESXi 6.5 and VAAI |
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Windows Server 2022 |
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Citrix Ready |
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OpenStack |
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Networking Protocols |
SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
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Supported Browsers |
- Google Chrome
- Firefox
- Microsoft Edge
- Safari
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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
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Notes |
For an updated list of supported browser versions, check the DSM Technical Specifications.
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Antivirus by McAfee (Trial) |
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Antivirus by McAfee (Trial)
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Suggested Concurrent Users |
100
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Notes |
- Measured with simulated users, each with an average record of 20,000 messages, emojis, or stickers. The required server response time is below ten seconds.
- When applicable, tested systems are configured with maximum memory and set to allow the maximum number of connections.
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Document Viewer |
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Document Viewer
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Download Station |
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Download Station
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Download Station
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Maximum Concurrent Download Tasks |
80
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Maximum iSCSI Target Number |
128
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Maximum LUN |
256
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LUN Clone/Snapshot, Windows ODX |
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Free Email Accounts |
5 (Additional accounts require purchase of licenses)
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Suggested Maximum Users |
500
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Suggested Concurrent Users |
100
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Maximum Server Performance |
1,224,000 emails per day, approx. 37GB
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Notes |
- For tested models with expandable memory, the maximum amount of RAM was installed.
- The performance of the mail system will slightly decrease in high-availability mode due to data synchronization between the two servers.
- Functions that were enabled in all of the tests above: anti-spam, anti-virus, DNSBL, greylist, content scan, full-text search (English only).
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DLNA Compliance |
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Facial Recognition |
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Object Recognition |
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Maximum Snapshots per Shared Folder |
1,024
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Maximum of System Snapshots |
65,536
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Default Licenses |
2 (Additional cameras require purchase of licenses)
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Maximum IP Cameras and Total FPS (H.264) |
- 720p: 40 channels, 1200 FPS
- 1080p: 40 channels, 1050 FPS
- 3M: 40 channels, 600 FPS
- 5M: 30 channels, 360 FPS
- 4K: 20 channels, 200 FPS
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Maximum IP Cameras and Total FPS (H.265) |
- 720p: 40 channels, 1200 FPS
- 1080p: 40 channels, 1200 FPS
- 3M: 40 channels, 1000 FPS
- 5M: 40 channels, 600 FPS
- 4K: 30 channels, 300 FPS
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Notes |
- Performance figures are obtained from testing conducted with the device fully populated with drives under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads.
- Use NVR Selector to quickly find a suitable model based on your requirements.
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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)
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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)
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Notes |
- Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
- Utilizing SSD cache can significantly improve performance.
- For tested models with expandable memory, the maximum amount of RAM was installed.
- Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
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Suggested Maximum Users |
3,000
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Suggested Concurrent Users |
1,200
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Notes |
- Multiple files were opened for testing and each file was edited by 30 users simultaneously.
- For tested models with expandable memory, the maximum amount of RAM was installed.
- Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
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Recommended Virtual Machine Instances |
4 (Learn more)
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Recommended Virtual DSM Number (Licenses required) |
4 (including 1 Free License)
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Notes |
The specifications vary depending on system configuration and memory size.
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Maximum Connections |
40
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