| Maximum Single Volume Size* | 108 TB |
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| Maximum Internal Volume Number | 64 |
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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 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
- RAID 10 (with Expansion Unit)
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| RAID Migration | - Basic to RAID 1
- Basic to RAID 5 (with Expansion Unit)
- RAID 1 to RAID 5 (with Expansion Unit)
- RAID 5 to RAID 6 (with Expansion Unit)
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| Volume Expansion with Larger HDDs | - Synology Hybrid RAID
- RAID 1
- RAID 5 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
- RAID 10 (with Expansion Unit)
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| Volume Expansion by Adding a HDD | - Synology Hybrid RAID
- JBOD (with Expansion Unit)
- RAID 5 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
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| Global Hot Spare Supported RAID Type | - Synology Hybrid RAID
- RAID 1 (with Expansion Unit)
- RAID 5 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
- RAID 10 (with Expansion Unit)
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| Notes | - Each internal volume (may consist of multiple drives) is expandable up to 108TB.
- 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.
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| File Protocol | SMB/AFP/NFS/FTP/WebDAV |
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| Maximum Concurrent SMB/AFP/FTP Connections | 500 |
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| Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion) | 1,500 |
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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 | 8 |
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| Maximum Hybrid Share Folders | 10 |
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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 | |
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| Syslog Events per Second | 800 |
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Virtualization | VMware vSphere with VAAI | |
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| Windows Server 2016 | |
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| Windows Server 2019 | |
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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, Espanol, Dansk, Norsk, Svenska, Nederlands, ???????, Polski, Magyar, Portugues do Brasil, Portugues Europeu, Türkçe, Český, ???????, ???, ???, ????, ???? |
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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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| Maximum Users | 1,500 |
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| Maximum Number of Concurrent Users | 100 |
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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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Download Station | 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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| 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 | 100 |
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| Maximum Server Performance | 1,224,000 emails per day, approx. 37GB |
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| Notes | - Models with 2 bays and dual M.2 drive slots 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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| Notes | Photo Station and Synology Moments are succeeded by Synology Photos in DSM 7.0. For a features comparison, check this article. |
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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) | 40 (including 2 Free License) (see all supported IP cameras) |
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| Total FPS (H.264) | 1200 FPS @ 720p (1280x720) 800 FPS @ 1080p (1920x1080) 350 FPS @ 3M (2048x1536) 280 FPS @ 5M (2591x1944) 170 FPS @ 4K (3840x2160) |
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| Total FPS (H.265) | 1200 FPS @ 720p (1280x720) 1200 FPS @ 1080p (1920x1080) 600 FPS @ 3M (2048x1536) 480 FPS @ 5M (2591x1944) 200 FPS @ 4K (3840x2160) |
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| Total FPS (MJPEG) | 450 FPS @ 720p (1280x720) 250 FPS @ 1080p (1920x1080) 200 FPS @ 3M (2048x1536) 100 FPS @ 5M (2591x1944) |
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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 | 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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| Maximum 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 | 2 (Learn more) |
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| Recommended Virtual DSM Number (Licenses required) | 2 (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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