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DiskStation DS423
Versatile data management platform for work and more

Private Cloud Hub for Essential File and Media Management
The Synology DiskStation DS423 offers four bays of storage and everything you need to consolidate, organize, and secure your data. Leverage built-in solutions in Synology DiskStation Manager (DSM) to sync and access files across multiple devices, create a digital photo hub for work or leisure, or secure your
premises with intelligent video surveillance tools.

Centralized Data Storage
Consolidate up to 72 TB of data, and enjoy 100% data ownership and multi-platform access from anywhere

Secure Sharing and Syncing
Safely access and share files and media from anywhere, and keep friends, partners, or collaborators on the same page

Simple Data Protection
Back up your media and documents to multiple destinations, and leverage snapshots to protect against malware

Versatile Surveillance
Protect your home or business with intuitive monitoring, archiving, and analysis tools for up to 30 IP cameras


CPU
- CPU Model: Realtek RTD1619B
- CPU Quantity: 1
- CPU Architecture: 64-bit
- CPU Frequency: 4-core 1.7 GHz
- Hardware Encryption Engine : Yes

Memory
- System Memory: 2 GB DDR4 non-ECC
- Notes: Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.

Storage
- Drive Bays: 4
- Compatible Drive Type
3.5" SATA HDD
2.5" SATA SSD
Hot Swappable Drive: Yes
- Notes "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.

External Ports
- RJ-45 1GbE LAN Port: 2 (with Link Aggregation / Failover support)
- USB 3.2 Gen 1 Port: 2
- Notes
This device's 1GbE LAN ports have a maximum transmission unit (MTU) size of 1,500 bytes.
The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.

File System
- Internal Drives
Btrfs
EXT4
- External Drives
Btrfs
EXT4
EXT3
FAT
NTFS
HFS+
exFAT

Appearance
- Size (Height x Width x Depth): 184 mm x 168 mm x 230 mm
- Weight: 2.21 kg

Others
- System Fan: 80 mm x 80 mm x 2 pcs
- Fan Speed Mode
Full-Speed Mode
Cool Mode
Quiet Mode
- Brightness: Adjustable Front LED Indicators: Yes
- Power Recovery: Yes
- Noise Level: 20.6 dB(A)
- Scheduled Power On / Off: Yes
- Wake on LAN / WAN: Yes
- Power Supply Unit / Adapter: 90 W
- AC Input Power Voltage: 100V to 240V AC
- Power Frequency: 50/60 Hz, Single Phase
- Power Consumption:
32.41 W (Access)
4.97 W (HDD Hibernation)
- British Thermal Unit:
110.52 BTU/hr (Access)
16.95 BTU/hr (HDD Hibernation)
- Notes
Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. 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 40°C (32°F to 104°F)
- Storage Temperature: -20°C to 60°C (-5°F to 140°F)
- Relative Humidity: 5% to 95% RH

Certification
- FCC
- CE
- BSMI
- VCCI
- RCM
- UKCA
- EAC
- CCC
- KC

Environment
- RoHS Compliant

Packaging Content
- Main Unit X 1
- Accessory Pack X 1
- AC Power Adapter X 1
- AC Power Cord X 1
- RJ-45 LAN Cable X 2
- Quick Installation Guide X 1

Optional Accessories
- 3.5" SATA HDD: HAT5300
- 2.5" SATA SSD: SAT5210
- Surveillance Device License Pack

Software Specs
DSM Specifications
Storage Management
- Maximum Single Volume Size: 108 TB
- Maximum Internal Volume Number: 64
- SSD TRIM: Yes
- Supported RAID Type
Synology Hybrid RAID
Basic
JBOD
RAID 0
RAID 1
RAID 5
RAID 6
RAID 10
- RAID Migration
Basic to RAID 1
Basic to RAID 5
RAID 1 to RAID 5
RAID 5 to RAID 6
- Volume Expansion with Larger HDDs
- Synology Hybrid RAID
RAID 1
RAID 5
RAID 6
RAID 10
- Volume Expansion by Adding a HDD
Synology Hybrid RAID
JBOD
RAID 5
- Global Hot Spare Supported RAID Type
Synology Hybrid RAID
RAID 1
RAID 5
- 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.

File Services
- File Protocol: SMB/AFP/NFS/FTP/WebDAV
- Maximum Concurrent SMB/AFP/FTP Connections: 200
- Windows Access Control List (ACL) Integration: Yes
- NFS Kerberos Authentication: Yes
- 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.

Account & Shared Folder
- Maximum Local User Accounts: 1,024
- Maximum Local Groups: 256
- Maximum Shared Folder: 256
- Maximum Shared Folder Sync Tasks: 4

Hybrid Share
- Maximum Hybrid Share Folders: 5

Hyper Backup
- Data & Folder Backup: Yes

Log Center
- Syslog Events per Second: 400

General Specifications
- Networking Protocols: SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV

Supported Browsers
- Google Chrome
- Firefox
- Microsoft Edge
- Safari

Add-on Packages
- Synology Chat: Yes

Download Station
- Maximum Concurrent Download Tasks: 80

SAN Manager
- Maximum iSCSI Target Number: 128
- Maximum LUN: 256
- LUN Clone/Snapshot, Windows ODX: Yes

Media Server
- DLNA Compliance: Yes

Synology Photos
- Facial Recognition: Yes

Snapshot Replication
- Maximum Snapshots per Shared Folder: 256
- Maximum of System Snapshots: 4,096

Surveillance Station
- Maximum IP cam (Licenses required): 30 (including 2 Free License)
- Total FPS (H.264)
900 FPS @ 720p (1280x720)
600 FPS @ 1080p (1920x1080)
300 FPS @ 3M (2048x1536)
200 FPS @ 5M (2591x1944)
150 FPS @ 4K (3840x2160)
- Total FPS (H.265) 900 FPS @ 720p (1280x720)
800 FPS @ 1080p (1920x1080)
500 FPS @ 3M (2048x1536)
450 FPS @ 5M (2591x1944)
200 FPS @ 4K (3840x2160)
- 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.

Synology Drive
- Recommended Number of Concurrent Sync Clients: 200 (the number of connections that can be maintained when the recommended number of hosted files was reached)
- Recommended Number of Hosted Files: 500,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)

Notes
- 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 Users: 200
- Notes
* Multiple files were opened for testing and each file was edited by 30 users simultaneously.
* Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM

- Video Station: Yes

VPN Server
- Maximum Connections: 20