DiskStation DS420j

CPU: Realtek RTD1296, 64-bit, 4-core 1.4 GHz 
Memory: 1 GB DDR4 non-ECC 
Drive Bays: 4  
RJ-45 1GbE LAN Port: 1 
USB 3.0 Port: 2 
Power Supply: 90W 
Warranty: 2 Years

Category: SYNOLOGY Tags: 4 BAY, DiskStation, DS420j, NAS, Synology

Description

Description

HARDWARE

SOFTWARE

HARDWARE

CPU	CPU Model	Realtek RTD1296
	CPU Quantity	1
	CPU Architecture	64-bit
	CPU Frequency	4-core 1.4 GHz
	Hardware Encryption Engine	✓
Memory	System Memory	1 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* (See all supported drives)	3.5″ SATA HDD 2.5″ SATA HDD 2.5″ SATA SSD
	Maximum Single Volume Size*	108 TB
	Hot Swappable Drive	–
	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	1
	USB 3.2 Gen 1 Port*	2
	Notes	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	EXT4
	External Drives	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 Low-power Mode
	Brightness Adjustable Front LED Indicators	✓
	Power Recovery	✓
	Noise Level*	20.6 dB(A)
	Scheduled Power On / Off	✓
	Wake on LAN / WAN	✓
	Power Supply Unit / Adapter	90 W
	AC Input Power Voltage	100 V to 240 V AC
	Power Frequency	50/60 Hz, Single Phase
	Power Consumption*	21.71 W (Access) 7.88 W (HDD Hibernation)
	British Thermal Unit	74.08 BTU/hr (Access) 26.89 BTU/hr (HDD Hibernation)
	Notes	Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s). 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	EAC CCC FCC CE BSMI VCCI RCM
Warranty	2 Years
	Notes	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
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 1 Quick Installation Guide X 1
Optional Accessories	VisualStation: VS960HD/VS360HD Surveillance Device License Pack

SOFTWARE

DSM Specifications
Storage Management	Maximum Internal Volume Number	64
	SSD TRIM	✓
	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
File Services	File Protocol	SMB/AFP/NFS/FTP/WebDAV
	Maximum Concurrent SMB/AFP/FTP Connections	100
	Windows Access Control List (ACL) Integration	✓
	NFS Kerberos Authentication	✓
	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
Log Center	Syslog Events per Second	200
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
	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	For an updated list of supported browser versions, check the DSM Technical Specifications.
Add-on Packages view the complete package list
Synology Chat	Maximum Users	10
	Notes	The number of concurrent HTTP connections for Synology Chat was configured to the maximum.
Download Station	Maximum Concurrent Download Tasks	80
SAN Manager	Maximum iSCSI Target Number	10
	Maximum LUN	10
	Notes	iSCSI Manager has been renamed to SAN Manager in DSM 7.0.
Media Server	DLNA Compliance	✓
Synology Photos	Facial Recognition	✓
	Notes	Photo Station and Synology Moments are succeeded by Synology Photos in DSM 7.0. For a features comparison, check this article.
Surveillance Station	Maximum IP cam (Licenses required)	16 (including 2 Free License) (See All Supported IP Cameras)
	Total FPS (H.264)	480 FPS @ 720p (1280×720) 288 FPS @ 1080p (1920×1080) 150 FPS @ 3M (2048×1536) 100 FPS @ 5M (2591×1944) 70 FPS @ 4K (3840×2160)
	Total FPS (H.265)	480 FPS @ 720p (1280×720) 384 FPS @ 1080p (1920×1080) 256 FPS @ 3M (2048×1536) 160 FPS @ 5M (2591×1944) 100 FPS @ 4K (3840×2160)
	Total FPS (MJPEG)	240 FPS @ 720p (1280×720) 150 FPS @ 1080p (1920×1080) 100 FPS @ 3M (2048×1536) 60 FPS @ 5M (2591×1944)
	Notes	Surveillance Station throughput is tested with Axis network camera, using continuous recording with live view from Surveillance Station and motion detection by camera. Live view and recording are sharing the same stream from the camera. The maximum channel number also includes devices installed on Virtual DSM. Total FPS may be affected by other services running at the same time (e.g., archive tasks performed by Archive Vault).
Synology Drive	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)
	Recommended Number of Concurrent Sync Clients	200 (the number of connections that can be maintained when the recommended number of hosted files was reached)
	Notes	Exceeding the recommended numbers above will not block application operations, but may result in longer response time. EXT4 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	Video Transcoding	Group 2 (See more)
VPN Server	Maximum Connections	10

DiskStation DS420j

Description

CPU

Memory

Storage

External Ports

File System

Appearance

Others

Temperature

Certification

Warranty

Environment

Packaging Content

Optional Accessories

DSM Specifications

Add-on Packages view the complete package list

Download Station

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