What is the difference between the DS220+ and DS420+ models?
The main difference s between these models is
- drive bay count – RAID1 vs RAID5/6
- Warranty – 2 vs 3 years
- NVMe cache – only 4-bay has it
- Virtualizations support – only 4 bay has it
- And copy button – only 2 bay has it
Performance-wise they are very similar since they feature the same CPU, but NVMe cache do help environments with 10 or more people connecting and servers running web site or database or virtual machines.
I hope this helps.
Synology comparison bellow:
CPU | ||
CPU Model | Intel Celeron J4025 | Intel Celeron J4025 |
CPU Architecture | 64-bit | 64-bit |
CPU Frequency | 2-core 2.0 (base) / 2.9 (burst) GHz | 2-core 2.0 (base) / 2.9 (burst) GHz |
Hardware Encryption Engine (AES-NI) | ||
Memory | ||
System Memory | 2 GB DDR4 non-ECC | 2 GB DDR4 non-ECC |
Total Memory Slots | 1 | 1 |
Maximum Memory Capacity | 6 GB (2 GB + 4 GB) | 6 GB (2 GB + 4 GB) |
Notes |
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Storage | ||
Drive Bays | 2 | 4 |
M.2 Drive Slots | 2 (NVMe) | |
Compatible Drive Type* (See all supported drives) |
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|
Maximum Single Volume Size* | 108 TB | 108 TB |
Hot Swappable Drive | ||
Notes |
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External Ports | ||
RJ-45 1GbE LAN Port | 2 (with Link Aggregation / Failover support) | 2 (with Link Aggregation / Failover support) |
USB 3.0 Port | 2 | 2 |
USB / SD Copy | ||
File System | ||
Internal Drives |
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External Drives |
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Notes | exFAT Access is purchased separately in Package Center. | exFAT Access is purchased separately in Package Center. |
Appearance | ||
Size (Height x Width x Depth) | 165 mm x 108 mm x 232.2 mm | 166 mm x 199 mm x 223 mm |
Weight | 1.30 kg | 2.18 kg |
Others | ||
System Fan | 92 mm x 92 mm x 1 pcs | 92 mm x 92 mm x 2 pcs |
Fan Speed Mode |
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|
Brightness Adjustable Front LED Indicators | ||
Power Recovery | ||
Noise Level* | 19.3 dB(A) | 19.8 dB(A) |
Scheduled Power On / Off | ||
Wake on LAN / WAN | ||
Power Supply Unit / Adapter | 60 W | 90 W |
AC Input Power Voltage | 100 V to 240 V AC | 100 V to 240 V AC |
Power Frequency | 50/60 Hz, Single Phase | 50/60 Hz, Single Phase |
Power Consumption* | 14.69 W (Access) 4.41 W (HDD Hibernation) |
28.30 W (Access) 8.45 W (HDD Hibernation) |
British Thermal Unit | 50.12 BTU/hr (Access) 15.05 BTU/hr (HDD Hibernation) |
96.63 BTU/hr (Access) 72.11 BTU/hr (HDD Hibernation) |
Notes |
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Temperature | ||
Operating Temperature | 0°C to 40°C (32°F to 104°F) | 0°C to 40°C (32°F to 104°F) |
Storage Temperature | -20°C to 60°C (-5°F to 140°F) | -20°C to 60°C (-5°F to 140°F) |
Relative Humidity | 5% to 95% RH | 5% to 95% RH |
Certification |
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|
Warranty | 2 Years | 3-year hardware warranty, extendable to 5-year coverage – EW201 |
Notes | The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) | The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) |
Environment | RoHS Compliant | RoHS Compliant |
Packaging Content |
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Optional Accessories |
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Notes | All memory modules will operate at the maximum frequency specified by the CPU manufacturer. | All memory modules will operate at the maximum frequency specified by the CPU manufacturer. |
Storage Management | ||
Maximum Internal Volume Number | 64 | 64 |
Maximum iSCSI Target Number | 128 | 128 |
Maximum iSCSI LUN | 256 | 256 |
iSCSI LUN Clone/Snapshot, Windows ODX | ||
SSD Read / Write Cache (White Paper) | ||
SSD TRIM | ||
Supported RAID Type |
|
|
RAID Migration | Basic to RAID 1 |
|
Volume Expansion with Larger HDDs |
|
|
Volume Expansion by Adding a HDD | Synology Hybrid RAID |
|
Global Hot Spare Supported RAID Type |
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File Services | ||
File Protocol | CIFS/AFP/NFS/FTP/WebDAV | CIFS/AFP/NFS/FTP/WebDAV |
Maximum Concurrent CIFS/AFP/FTP Connections | 500 | 500 |
Maximum Concurrent CIFS/AFP/FTP Connections (with RAM expansion) | 1,500 | 1,500 |
Windows Access Control List (ACL) Integration | ||
NFS Kerberos Authentication | ||
Account & Shared Folder | ||
Maximum Local User Accounts | 2,048 | 2,048 |
Maximum Local Groups | 256 | 256 |
Maximum Shared Folder | 256 | 512 |
Maximum Shared Folder Sync Tasks | 8 | 8 |
High Availability | ||
Synology High Availability | ||
Log Center | ||
Syslog Events per Second | 400 | 400 |
Virtualization | ||
VMware vSphere 6 with VAAI | ||
Windows Server 2016 | ||
Citrix Ready | ||
OpenStack | ||
General Specifications | ||
Networking 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 |
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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 | 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 |
Antivirus by McAfee (Trial) | ||
Central Management System | ||
Synology Chat | ||
Maximum Users | 1,000 | 1,000 |
Notes |
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|
Document Viewer | ||
Download Station | ||
Maximum Concurrent Download Tasks | 80 | 80 |
exFAT Access (Optional) | ||
Synology MailPlus / MailPlus Server | ||
Free Email Accounts | 5 (Licenses required for additional accounts) | 5 (Licenses required for additional accounts) |
Maximum Number of Concurrent Users | 50 | 50 |
Maximum Server Performance | 936,000 emails per day, approx. 28GB | 936,000 emails per day, approx. 28GB |
Notes |
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|
Media Server | ||
DLNA Compliance | ||
Moments | ||
Facial Recognition | ||
Subject Recognition | ||
Auto Color & Rotate | ||
Moments Select | ||
Snapshot Replication | ||
Maximum Snapshots per Shared Folder | 1,024 | 1,024 |
Maximum of System Snapshots | 65,536 | 65,536 |
Surveillance Station | ||
Maximum IP cam (Licenses required) | 25 (including 2 Free License) (See All Supported IP Cameras) | 25 (including 2 Free License) (See All Supported IP Cameras) |
Total FPS (H.264) | 750 FPS @ 720p (1280×720) 700 FPS @ 1080p (1920×1080) 350 FPS @ 3M (2048×1536) 240 FPS @ 5M (2591×1944) 120 FPS @ 4K (3840×2160) |
750 FPS @ 720p (1280×720) 700 FPS @ 1080p (1920×1080) 350 FPS @ 3M (2048×1536) 240 FPS @ 5M (2591×1944) 120 FPS @ 4K (3840×2160) |
Total FPS (H.265) | 750 FPS @ 720p (1280×720) 750 FPS @ 1080p (1920×1080) 500 FPS @ 3M (2048×1536) 250 FPS @ 5M (2591×1944) 200 FPS @ 4K (3840×2160) |
750 FPS @ 720p (1280×720) 750 FPS @ 1080p (1920×1080) 500 FPS @ 3M (2048×1536) 250 FPS @ 5M (2591×1944) 200 FPS @ 4K (3840×2160) |
Total FPS (MJPEG) | 450 FPS @ 720p (1280×720) 250 FPS @ 1080p (1920×1080) 160 FPS @ 3M (2048×1536) 130 FPS @ 5M (2591×1944) |
450 FPS @ 720p (1280×720) 250 FPS @ 1080p (1920×1080) 160 FPS @ 3M (2048×1536) 130 FPS @ 5M (2591×1944) |
Notes |
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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) | 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 | 350 (the number of connections that can be maintained when the recommended number of hosted files was reached) | 350 (the number of connections that can be maintained when the recommended number of hosted files was reached) |
Notes |
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Synology Office | ||
Maximum Users | 600 | 600 |
Notes |
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Video Station | ||
Virtual Machine Manager | ||
Recommended Virtual Machine Instances | 2 (Learn more) | 2 (Learn more) |
Recommended Virtual DSM Number (Licenses required) | 2 (including 1 Free License) | 2 (including 1 Free License) |
Notes | The specifications vary depending on system configuration and memory size. | The specifications vary depending on system configuration and memory size. |
VPN Server | ||
Maximum Connections | 30 | 30 |
Where to Buy a Product | |||
VISIT RETAILER ➤ | |||
VISIT RETAILER ➤ | |||
VISIT RETAILER ➤ | |||
VISIT RETAILER ➤ | |||
VISIT RETAILER ➤ |
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