DSM Specifications
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Maximum Single Volume Size* |
- 1 PB (64 GB memory required, for RAID 6 groups only)
- 200 TB
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Maximum Internal Volume Number |
256 |
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SSD Read / Write Cache (White Paper) |
Yes |
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SSD TRIM |
Yes |
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RAID Group |
Yes |
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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 |
- RAID F1
- JBOD
- RAID 5
- RAID 6
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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.
- On Peta Volume enabled volumes, Snapshot Replication, SSD caching, shared folder encryption, and compression will not be available. Please refer to this article for more information on limitations.
- Actual maximum storage pool and volume sizes depend on drive sizes used, the number of drive bays available, and the RAID configuration.
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File Protocol |
SMB/AFP/NFS/FTP/WebDAV |
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Maximum Concurrent SMB/AFP/FTP Connections |
8,000 |
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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 |
Yes |
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NFS Kerberos Authentication |
Yes |
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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 |
30 |
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Notes |
For more details about the maximum number of Hybrid Share folders, check this article. |
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Synology High Availability |
Yes |
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Syslog Events per Second |
3,000 |
Virtualization
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VMware vSphere with VAAI |
Yes |
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Windows Server 2016 |
Yes |
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Windows Server 2019 |
Yes |
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Citrix Ready |
Yes |
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OpenStack |
Yes |
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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)
|
Yes |
|
Yes |
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Maximum Users |
6,000 |
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Maximum Number of Concurrent Users |
1,500 |
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Notes |
When applicable, systems are tested configured with maximum memory and set to allow the maximum number of connections. |
Document Viewer
|
Yes |
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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 |
Yes |
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Notes |
iSCSI Manager has been renamed to SAN Manager in DSM 7.0. |
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Free Email Accounts |
5 (Licenses required for additional accounts) |
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Maximum Number of Concurrent Users |
2,200 |
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Maximum Server Performance |
5,721,000 emails per day, approx. 174GB |
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Notes |
- FS series were installed with 12 SSDs in RAID F1 configuration.
- 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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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) |
150 (including 2 Free License) (see all supported IP cameras) |
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Total FPS (H.264) |
4500 FPS @ 720p (1280×720)
4500 FPS @ 1080p (1920×1080)
4500 FPS @ 3M (2048×1536)
3300 FPS @ 5M (2591×1944)
2100 FPS @ 4K (3840×2160) |
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Total FPS (H.265) |
4500 FPS @ 720p (1280×720)
4500 FPS @ 1080p (1920×1080)
4500 FPS @ 3M (2048×1536)
4500 FPS @ 5M (2591×1944)
4500 FPS @ 4K (3840×2160) |
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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 |
2,000 (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 |
100,000,000 (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 |
3,400 |
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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 |
32 (Learn more) |
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Recommended Virtual DSM Number (Licenses required) |
32 (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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