DSM Specifications |
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Maximum Single Volume Size* |
- 200 TB (32 GB memory required)
- 108 TB
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Maximum Internal Volume Number |
256
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SSD Read / Write Cache (White Paper) |
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SSD TRIM |
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RAID Group |
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Supported RAID Type |
- RAID F1
- 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 |
- RAID F1
- RAID 1
- RAID 5
- RAID 6
- RAID 10
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Volume Expansion by Adding a HDD |
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Global Hot Spare Supported RAID Type |
- RAID F1
- RAID 1
- RAID 5
- RAID 6
- RAID 10
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Notes |
- 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.
- Each internal volume (may consist of multiple drives) is expandable up to 108 TB (with memory less than 32 GB) or 200 TB (with memory equal to or greater than 32 GB).
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File Protocol |
SMB/AFP/NFS/FTP/WebDAV
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Maximum Concurrent SMB/AFP/FTP Connections |
4,000
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Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion) |
10,000
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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.
- During testing, the maximum number of SSDs supported by this model is installed in a RAID 5 configuration.
- 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 |
16,000
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Maximum Local Groups |
512
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Maximum Shared Folder |
512
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Maximum Shared Folder Sync Tasks |
32
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Maximum Hybrid Share Folders |
15
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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 |
3,000
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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, Fibre Channel, 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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Maximum Users |
4,000
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Maximum Number of Concurrent Users |
500
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Notes |
When applicable, systems are tested 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 |
256
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Maximum LUN |
512
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LUN Clone/Snapshot, Windows ODX |
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Free Email Accounts |
5 (Licenses required for additional accounts)
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Maximum Number of Concurrent Users |
800
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Maximum Server Performance |
4,235,000 emails per day, approx. 129 GB
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Notes |
- Models with more than 4 bays were installed with two SSDs for SSD cache.
- 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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Maximum IP cam (Licenses required) |
90 (including 2 Free License) (see all supported IP cameras)
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Total FPS (H.264) |
2700 FPS @ 720p (1280x720)
2250 FPS @ 1080p (1920x1080)
1500 FPS @ 3M (2048x1536)
900 FPS @ 5M (2591x1944)
550 FPS @ 4K (3840x2160)
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Total FPS (H.265) |
2700 FPS @ 720p (1280x720)
2700 FPS @ 1080p (1920x1080)
2250 FPS @ 3M (2048x1536)
1500 FPS @ 5M (2591x1944)
1080 FPS @ 4K (3840x2160)
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Notes |
- Maximum IP cameras and FPS figures are tested with the device fully populated with drives and under a continuous recording setup.
- Actual system capabilities may differ depending on system configuration, drive performance, number of features enabled, and if additional workloads are present.
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Recommended Number of Concurrent Sync Clients |
1,800 (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 |
50,000,000 (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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Maximum Users |
2,900
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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 |
12 (Learn more)
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Recommended Virtual DSM Number (Licenses required) |
12 (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 |
60
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