Product Overview
Manufacturer product information
High-performance petabyte-scale storage for enterprise workloads.
Technical Specifications
Structured product specifications
CPU > CPU Model Intel Xeon D-1739
CPU Quantity 1
CPU Cores 8
CPU Threads 16
CPU Architecture 64-bit
CPU Frequency 3.0 (base) / 3.5 (turbo) GHz
Memory > System Memory 16 GB DDR4 ECC RDIMM
Memory Module Pre-installed 16 GB (16 GB × 1)
Total Memory Slots 6
Maximum Memory Capacity 96 GB (16 GB × 6)
Notes Synology may revise pre-installed memory module specifications in response to component lifecycle and supply conditions. All revised components undergo the same rigorous validation to ensure equivalent compatibility, stability, and performance.Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion.For information about recommended memory configurations, please check the Product Manual of your Synology product.
Storage > Drive Bays (See all supported drives) .bx{display:inline-block;vertical-align:middle;}.it{display:flex;}.it::before{content:'• ';white-space:pre;}.it:only-child::before{display:none;}12 × 3.5" SATA HDD or 2.5" SATA SSD
Maximum Drive Bays with Expansion Unit 48 (RX1225RP × 3)
Notes #2 Compatible drives are mandatory. Please consult our compatibility list before purchasing hard drives. For more details, please refer to this article.SSD cache can be enabled with select compatible SSD. See the compatibility list for model-specific support and details. SSDs are sold separately.
External Ports > RJ-45 10GbE LAN Port 2
Out-of-Band Management LAN Port 1
USB 3.2 Gen 1 Port 2
Expansion Port 3
Expansion Port Type Mini-SAS HD
PCIe > PCIe Expansion 2 × Gen4 x8 slot (x8 link)
Appearance > Form Factor (RU) 2U
Size (Height × Width × Depth) 88 mm × 482 mm × 724 mm
Weight 14.5 kg
Rack Installation Support* 4-post 19" rack (Synology Rail Kit - RKS-02)
Notes #3 The rail kit is sold separately
Others > System Fan 80 mm × 80 mm × 4 pcs
Fan Speed Mode Full-Speed ModeCool ModeQuiet Mode
Noise Level 46.3 dB(A)
Power Supply Unit / Adapter 550 watts
AC Input Power Voltage 100 V to 240 V AC
Power Frequency 50/60 Hz, Single Phase
Power Consumption 155.24 watts (Access)76.15 watts (HDD Hibernation)
British Thermal Unit 529.37 BTU/hr (Access)259.67 BTU/hr (HDD Hibernation)
Notes #4 For more information on how power consumption is measured, refer to this article.Noise testing was conducted with the Synology system fully installed with Synology SATA SSDs and in an idle state. Two G.R.A.S. type 40AE microphones were placed at a 1 m distance from the front and rear of the device. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%.
Temperature > Operating Temperature 0°C to 35°C (32°F to 95°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F)
Operating Humidity 8% to 80% RH
Storage Humidity 5% to 95% RH
Certification FCCCEBSMIVCCIRCMUKCAEACCCCKCBISUL
Warranty 5 Years
Notes #5 The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment RoHS Compliant
Packaging Content Main Unit × 1Accessory Pack × 1C13 to C14 power cord × 2Front Cover × 1
Optional Accessories DDR4 ECC RDIMM: D4ER02-16GExpansion Units: RX1225RPEnterprise Series 3.5" SATA HDD: HAT5300 SeriesEnterprise Series 2.5" SATA SSD: SAT5200 SeriesM.2 SSD & 10GbE Combo Adapter Card: E10M20-T1M.2 SSD Adapter Card: M2D2025GbE Network Interface Card: E25G30-F210GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G30-T1Rail Kit Sliding: RKS-02
Notes #6 For multi-module memory configurations, all modules must be identical and share the same model number. Check the Product Manual of your Synology product for recommended memory configurations.
Storage Management > Maximum Single Volume Size 1 PB (64 GB memory required, for RAID 6 groups only)200 TB (32 GB memory required)108 TB
Maximum Internal Volume Number 32
Supported RAID Type RAID F1BasicJBODRAID 0RAID 1RAID 5RAID 6RAID 10
RAID Migration Basic to RAID 1Basic to RAID 5RAID 1 to RAID 5RAID 5 to RAID 6
Volume Expansion with Larger HDDs RAID F1RAID 1RAID 5RAID 6RAID 10
Volume Expansion by Adding a HDD RAID F1JBODRAID 5RAID 6
Global Hot Spare Supported RAID Type RAID F1RAID 1RAID 5RAID 6RAID 10
Notes #7 Volumes over 108 TB require 32 GB of memory or more.Certain conditions are required to support a 1 PB volume. Please refer to this article for more information.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.Storage efficiency helps reduce storage space consumption through deduplication and compression. For more information about this feature and its support requirements, please refer to this article.
File System > Internal Drives Btrfs
External Drives Btrfsext4ext3FAT32NTFSHFS+exFAT
File Services > File Protocol SMBAFPNFSFTPWebDAVRsync
Maximum Number of SMB Connections (FSCT-Based) 2,800
Notes #8 Connection value of this model is tested with Synology SATA SSD fully populated and up to four 10GbE network portsModels 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 10,240
Maximum Local Groups 512
Maximum Shared Folder 512
Maximum Shared Folder Sync Tasks 32
Hybrid Share > Maximum Hybrid Share Folders 30
Hyper Backup Folder and Package Backup
High Availability Synology High Availability
Log Center > Syslog Events per Second 3,000
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
Microsoft Hyper-V Windows Server 2025, Windows Server 2022
Citrix XenServer XenServer 8.4, XenServer 8, Citrix Hypervisor 8.2 LTSR CU1
OpenStack Cinder
General Specifications > Supported Protocols SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers ChromeFirefoxEdgeSafari
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
Notes #9 For an updated list of supported browser versions, check the DSM Technical Specifications.
Synology AI Console Third-Party AI Model Integration
Maximum De-Identification Rate 2,800 words per second
Notes #10 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 500
Notes #11 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
SAN Manager > Maximum iSCSI Target Number 256
Maximum LUN 512
Synology MailPlus / MailPlus Server > Free Email Accounts 5 (Additional accounts require purchase of licenses)
Maximum Number of Users 6,000
Notes #12 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 moreModels 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
Snapshot Replication > Maximum Snapshots per Shared Folder 1,024
Maximum Snapshots per LUN 256
Maximum Snapshots per System 65,536
Maximum Replication Tasks for Shared Folders 128
Maximum Replication Tasks for LUNs 64
Maximum Replication Tasks per System 128
Surveillance Station > Default Licenses 2 (Additional cameras require purchase of licenses)
Maximum IP Cameras and Total FPS (H.264) 1080p: 125 channels, 2625 FPS3M: 125 channels, 1500 FPS5M: 110 channels, 1100 FPS4K: 70 channels, 700 FPS
Maximum IP Cameras and Total FPS (H.265) 1080p: 125 channels, 3750 FPS3M: 125 channels, 2625 FPS5M: 125 channels, 1500 FPS4K: 110 channels, 1100 FPS
Notes #13 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 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 5,100
Maximum 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)
Notes #14 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 moreModels 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 5,000
Notes #15 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 moreModels 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 16 (Learn more)
Recommended Virtual DSM Number (Licenses required) 16 (including 1 Free License)
Notes #16 The specifications vary depending on system configuration and memory size.
VPN Server > Maximum Connections 32
