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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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SSD Read/Write Cache (Determining cache size) |
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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
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Global Hot Spare Supported RAID Type |
- Synology Hybrid RAID
- RAID 1
- RAID 5
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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.
- 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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Internal Drives |
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External Drives |
- Btrfs
- ext4
- ext3
- FAT
- NTFS
- HFS+
- exFAT
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File Protocol |
- SMB
- AFP
- NFS
- FTP
- WebDAV
- Rsync
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Maximum Concurrent SMB/AFP/FTP Connections |
500 |
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Windows Access Control List (ACL) Integration |
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NFS Kerberos Authentication |
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Notes |
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 |
8 |
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Maximum Hybrid Share Folders |
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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Supported 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 |
- Chrome
- Firefox
- 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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Suggested 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.
- Models with expandable memory are tested with their maximum supported memory.
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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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DLNA Compliance |
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Facial 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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Suggested Maximum IP Cameras and Total FPS (H.264) |
- 1080p: 40 channels, 800 FPS
- 3M: 35 channels, 350 FPS
- 5M: 28 channels, 280 FPS
- 4K: 17 channels, 170 FPS
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Suggested Maximum IP Cameras and Total FPS (H.265) |
- 1080p: 40 channels, 1200 FPS
- 3M: 40 channels, 600 FPS
- 5M: 40 channels, 480 FPS
- 4K: 20 channels, 200 FPS
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Notes |
- Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and 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.
- The number of streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.
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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.
- Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
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Suggested Users |
3,000 |
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Notes |
- Suggested users is derived from testing in an environment with 60% idle users (each logging in and viewing documents) and 40% active users (each executing random actions at intervals of 20 to 40 seconds) operating within documents, each document having 30 users. Learn more
- Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
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Maximum Connections |
40 |
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