DSM Specifications | DS725+ | DS725neo+ |
|---|
| Storage Management | Maximum Single Volume Size | - 200 TB (32 GB memory required)
- 108 TB
| - 200 TB (32 GB memory required)
- 108 TB
|
| Maximum Internal Volume Number | 32 | 32 |
| M.2 SSD Storage Pool Support* | | |
| SSD Read/Write Cache(Determining cache size) | | |
| SSD TRIM | | |
| Storage Efficiency | | |
| 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)
| - Synology Hybrid RAID
- Basic
- JBOD
- RAID 0
- RAID 1
- RAID 5 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
- RAID 10 (with Expansion Unit)
|
| 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)
| - 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)
|
| 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)
| - Synology Hybrid RAID
- RAID 1
- RAID 5 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
- RAID 10 (with Expansion Unit)
|
| Volume Expansion by Adding a HDD | - Synology Hybrid RAID (with Expansion Unit)
- JBOD (with Expansion Unit)
- RAID 5 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
| - Synology Hybrid RAID (with Expansion Unit)
- JBOD (with Expansion Unit)
- RAID 5 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
|
| Global Hot Spare Supported RAID Type | - Synology Hybrid RAID (with Expansion Unit)
- RAID 1 (with Expansion Unit)
- RAID 5 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
- RAID 10 (with Expansion Unit)
| - Synology Hybrid RAID (with Expansion Unit)
- RAID 1 (with Expansion Unit)
- RAID 5 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
- RAID 10 (with Expansion Unit)
|
| Notes | - Volumes over 108 TB require 32 GB of memory or more.
- Actual maximum storage pool and volume sizes depend on drive sizes used, the number of drive bays available, and the RAID configuration.
- 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.
- 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)
- Storage efficiency helps reduce storage space consumption through deduplication and compression. For more information about this feature and its support requirements, please refer tothis article.
|
| File System | Internal Drives | | |
| External Drives | - Btrfs
- ext4
- ext3
- FAT32
- NTFS
- HFS+
- exFAT
| - Btrfs
- ext4
- ext3
- FAT32
- NTFS
- HFS+
- exFAT
|
| File Services | File Protocol | | |
| Maximum Number of SMB Connections (FSCT-Based) | 30 | 30 |
| Windows Access Control List (ACL) Integration | | |
| NFS Kerberos Authentication | | |
| Notes | - Connection value of this model is tested with Synology SATA HDD fully populated and all onboard network ports
- Models with expandable memory are tested with the maximum supported quantity installed.
- SMB performance was evaluated using Microsoft File Server Capacity Tool (FSCT) version 1.3, with the following configuration:
- Test workload: HomeFolder scenario provided by the FSCT tool
- Test duration: 600 seconds
- Domain controller & FSCT controller: Windows Server 2022
- FSCT clients: 8 Windows 10 machines
- SMB feature: Directory leasing enabled
|
| Account & Shared Folder | Maximum Local User Accounts | 512 | 512 |
| Maximum Local Groups | 128 | 128 |
| Maximum Shared Folder | 128 | 128 |
| Maximum Shared Folder Sync Tasks | 4 | 4 |
| Hybrid Share | Hybrid Share Folder Number | 10 | 10 |
| Hyper Backup | Data & Folder Backup | | |
| Entire System Backup | | |
| High Availability | Synology High Availability | | |
| Log Center | Syslog Events per Second | 800 | 800 |
| Virtualization | VMware vSphere | ESXi 8.0 U2, ESXi 8.0 U1, ESXi 8.0, ESXi 7.0 U3, ESXi 7.0 U2, ESXi 7.0 U1, ESXi 7.0, ESXi 6.7 U3, ESXi 6.7 U2, ESXi 6.7 U1, ESXi 6.7, ESXi 6.5 U3, ESXi 6.5 U2, ESXi 6.5 U1, ESXi 6.5 | ESXi 8.0 U2, ESXi 8.0 U1, ESXi 8.0, ESXi 7.0 U3, ESXi 7.0 U2, ESXi 7.0 U1, ESXi 7.0, ESXi 6.7 U3, ESXi 6.7 U2, ESXi 6.7 U1, ESXi 6.7, ESXi 6.5 U3, ESXi 6.5 U2, ESXi 6.5 U1, ESXi 6.5 |
| Microsoft Hyper-V | Windows Server 2025, Windows Server 2022 | Windows Server 2025 |
| Citrix XenServer | XenServer 8.4, XenServer 8, Citrix Hypervisor 8.2 LTSR CU1 | XenServer 8.4, XenServer 8, Citrix Hypervisor 8.2 LTSR CU1 |
| OpenStack | Cinder | Cinder |
| General Specifications | Supported Protocols | SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV | SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV |
| Supported Browsers | | |
| Supported Language | English, Deutsch, Franais, Italiano, Espaol, Dansk, Norsk, Svenska, Nederlands, , Polski, Magyar, Portugus do Brasil, Portugus Europeu, Trke, esk, , , , , | English, Deutsch, Franais, Italiano, Espaol, Dansk, Norsk, Svenska, Nederlands, , Polski, Magyar, Portugus do Brasil, Portugus Europeu, Trke, esk, , , , , |
| Notes | For an updated list of supported browser versions, check theDSM Technical Specifications. |
Add-on Packagesview the complete package list |
| Central Management System | | | |
| Synology AI Console | Third-Party AI Model Integration | | |
| Maximum De-Identification Rate | 30 words per second | 30 words per second |
| Notes | - De-identification performance measurement: Filters for Credit Card Numbers, IBAN, Individual Taxpayer Identification Number, SSN, and Names applied to a 4,355-word English text.
- To enable de-identification, your device must have at least 8 GB of memory and Container Manager installed.
|
| Synology Chat | Maximum Number of Users | 100 | 100 |
| 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 the maximum supported quantity installed.
|
| Download Station | Maximum Concurrent Download Tasks | 80 | 80 |
| SAN Manager | Maximum iSCSI Target Number | 32 | 32 |
| Maximum LUN | 64 | 64 |
| LUN Clone/Snapshot, Windows ODX | | |
| Synology MailPlus / MailPlus Server | Free Email Accounts | 5(Additional accounts require purchase of licenses) | 5(Additional accounts require purchase of licenses) |
| Maximum Number of Users | 60 | 60 |
| Notes | - The suggested maximum number of users is based on the following workload: 20% of users with a 20,000 item mailbox randomly performing actions and receiving 240 emails per day, and 80% of users receiving 20 emails per day.Learn more
- Models with SSD support are tested with a single SSD volume.
- Models with expandable memory are tested with the maximum supported quantity installed.Learn more about memory requirements.
- Operating in high-availability mode will incur additional overhead.
- Features enabled during evaluation: anti-spam, anti-virus, DNSBL, greylist, content scanning, and full-text search (English).
|
| Media Server | DLNA Compliance | | |
| Synology Photos | Facial Recognition | | |
| Object Recognition | | |
| Snapshot Replication | Maximum Snapshots per Shared Folder | 256 | 256 |
| Maximum Snapshots per LUN | 32 | 32 |
| Maximum Snapshots per System | 2,048 | 2,048 |
| Maximum Replication Tasks for Shared Folders | 32 | 32 |
| Maximum Replication Tasks for LUNs | 16 | 16 |
| Maximum Replication Tasks per System | 32 | 32 |
| Surveillance Station | Default Licenses | 2(Additional cameras require purchase of licenses) | 2(Additional cameras require purchase of licenses) |
| 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
| - 1080p: 40 channels, 800 FPS
- 3M: 35 channels, 350 FPS
- 5M: 28 channels, 280 FPS
- 4K: 17 channels, 170 FPS
|
| 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
| - 1080p: 40 channels, 1200 FPS
- 3M: 40 channels, 600 FPS
- 5M: 40 channels, 480 FPS
- 4K: 20 channels, 200 FPS
|
| 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.
- UseNVR Selectorto quickly find a suitable model based on your requirements.
- The number of video channels that can be viewed simultaneously is double the maximum number of cameras for the same codec and resolution.
- The values above are based on testing with RTSP streaming. If SRTP is enabled for all cameras, overall performance will decrease to 70% of the stated figures.
|
| Synology Drive | Maximum Number of Users | 50 | 50 |
| Maximum Number of Hosted Files | 500,000 (applies to files indexed or hosted bySynology Drive. For file access through other standard protocols, refer to the File Services section above) | 500,000 (applies to files indexed or hosted bySynology Drive. For file access through other standard protocols, refer to the File Services section above) |
| Notes | - The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle.Learn more
- Models with SSD support are tested with a single SSD volume.
- Models with expandable memory are tested with the maximum supported quantity installed.
- Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
- Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
|
| Synology Office | Maximum Number of Users | 50 | 50 |
| Notes | - The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file.Learn more
- Models with SSD support are tested with a single SSD volume.
- Models with expandable memory are tested with the maximum supported quantity installed.
- Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
|
| Virtual Machine Manager | Recommended Virtual Machine Instances | 4(Learn more) | 4(Learn more) |
| Recommended Virtual DSM Number(Licenses required) | 4 (including 1 Free License) | 4 (including 1 Free License) |
| Notes | The specifications vary depending on system configuration and memory size. |
| VPN Server | Maximum Connections | 8 | 8 |
