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Description
Synology Network Video Recorder DVA3221 4bay desktop NVR Atom C3538 8GB DDR4 108TB RetailMPN DVA3221 CPU CPU Model Intel Atom C3538 CPU Architecture 64 bit CPU Frequency Quad Core 2. 1 GHz Hardware Encryption Engine (AES NI) Yes GPU GPU Model NVIDIA GeForce GTX 1650 Notes Display output is not supported. Storage Drive Bays 4 Maximum Drive Bays with Expansion Unit 14 (DX517 x 2) Compatible Drive Type 3. 5" SATA HDD 2. 5" SATA HDD 2. 5" SATA SSD Maximum Internal Raw Capacity 64 TB (16 TB drive x 4) (Capacity may vary by RAID types) Maximum
MPNDVA3221
CPU
CPU Model
Intel Atom C3538
CPU Architecture
64-bit
CPU Frequency
Quad Core 2.1 GHz
Hardware Encryption Engine (AES-NI)
Yes
GPU
GPU Model
NVIDIA GeForce GTX 1650
Notes
Display output is not supported.
Storage
Drive Bays
4
Maximum Drive Bays with Expansion Unit
14 (DX517 x 2)
Compatible Drive Type
3.5" SATA HDD
2.5" SATA HDD
2.5" SATA SSD
Maximum Internal Raw Capacity
64 TB (16 TB drive x 4) (Capacity may vary by RAID types)
Maximum Raw Capacity with Expansion Units
224 TB (16 TB drive x 14) (Capacity may vary by RAID types)
Maximum Single Volume Size
108 TB
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.
The maximum raw capacity is not limited by the maximum single volume size. Synology NAS models may utilize capacities over the maximum single volume size as long as each volume created is below the limit.
Each internal volume (may consist of multiple drives) is expandable up to 108TB.
External Ports
RJ-45 1GbE LAN Port
4 (with Link Aggregation / Failover support)
USB 3.0 Port
3
eSATA Port
2
COM Port
1
Others
Wake on LAN / WAN
Yes
System Fan
120 mm x 120 mm x 1 pcs
Fan Speed Mode
Cool Mode
Quiet Mode
Full-Speed Mode
Power Recovery
Yes
Noise Level
28.3 dB(A)
Scheduled Power On / Off
Yes
Power Supply Unit / Adapter
250 W
AC Input Power Voltage
100 V to 240 V AC
Power Frequency
50/60 Hz, Single Phase
Power Consumption
43.92 W (Access)
28.43 W (HDD Hibernation)
British Thermal Unit
149.86 BTU/hr (Access)
97.01 BTU/hr (HDD Hibernation)
Notes
Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
Temperature
Operating Temperature
0oC to 40oC (32oF to 104oF)
Storage Temperature
-20oC to 60oC (-5oF to 140oF)
Relative Humidity
5% to 95% RH
Certification
FCC
CE
BSMI
EAC
VCCI
RCM
Environment
RoHS Compliant
Packaging Content
Main Unit X 1
Accessory Pack X 1
AC Power Cord X 1
RJ-45 LAN Cable X 2
Quick Installation Guide X 1
Optional Accessories
DDR4 ECC SODIMM: D4ECSO-2666-16G
Expansion Units: DX517
3.5" SATA HDD: HAT5300
2.5" SATA SSD: SAT5200
VisualStation: VS960HD/VS360HD
Surveillance Device License Pack
Notes
The original non-ECC memory modules must be removed before the optional ECC memory modules can be installed.
Surveillance Station
Video Analysis
Deep Video Analytics Feature
People and vehicle detection
People counting
Face recognition
Intrusion detection
Maximum Number of Deep Video Analytics Tasks
6
Maximum Number of Registrations Supported by Face Database
10,000
General Specifications
Maximum IP cam
32 (including 8 Free License)
Total FPS (H.264)
960 FPS at 720p (1280x720), 32 Channels
448 FPS at 1080p (1920x1080), 32 Channels
280 FPS at 3M (2048x1536), 28 Channels
190 FPS at 5M (2591x1944), 19 Channels
130 FPS at 4K (3840x2160), 13 Channels
Total FPS (H.265)
960 FPS at 720p (1280x720), 32 Channels
960 FPS at 1080p (1920x1080), 32 Channels
320 FPS at 3M (2048x1536), 32 Channels
200 FPS at 5M (2591x1944), 20 Channels
150 FPS at 4K (3840x2160), 15 Channels
Video Codec
H.264
H.264+
H.265
H.265+
MJPEG
MPEG-4
MxPEG (not supported by Deep Video Analytics tasks)
Audio Codec
AAC
AMR
G711
G726
PCM
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.
Total FPS may be affected by other services running at the same time (e.g., archive tasks performed by Archive Vault).
The maximum channel number also includes devices installed on Virtual DSM.
System Services
File System
Internal Drives
Btrfs
EXT4
Storage Management
Maximum Internal Volume Number
64
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 10
RAID 1
RAID 5
RAID 6
Volume Expansion by Adding a HDD
Synology Hybrid RAID
JBOD
RAID 5
RAID 6 (with Expansion Unit)
Global Hot Spare Supported RAID Type
Synology Hybrid RAID
RAID 1
RAID 5
RAID 6
RAID 10
File Services
File Protocol
CIFS/AFP/NFS/FTP/WebDAV
Account and Shared Folder
Maximum Local User Accounts
2,048
Maximum Local Groups
256
Maximum Shared Folder
512
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
Supported Language
English, Deutsch, Franais, Italiano, Espaol, Dansk, Norsk, Svenska, Nederlands, , Polski, Magyar, Portugus do Brasil, Portugus Europeu, Trke, esk, , , , ,
VPN Server
Maximum Connections
30
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 24 reviews
Sort
Product Reviews
★★★★★ 5
Budget buy while being as comfy and stylish as an expensive brand!
Size: 9.5, Color: Navy, Size: 9.5, Color: Navy
My 14 year old had been running his own business since he was 12. He does lawn care and snow removal. His go to shoes when it's too hot for his work boots has always been off brand hey d*de style ones which are terrible for that kind of work as they just don't have the ankle support.
He's also had some Orthopedic arch supports custom made for him through the DR in the last year that he needs to use in whatever shoes he's wearing at the time. So I've been on the search for a simple pair of slip on shoes that he could wear while working long hours around our community.
He's sent me this picture tonight before heading out. He said "I didn't feel like putting my arch supports in and these are so comfy that I don't even notice I don't have them!"
They are sharp looking shoes that really stand out as of they were A high end pair! It's great that they can be an every day style or could be more of a sport shoe as they have the support and padding for both options.
In our case they likely be green with in a day or two and it'll be interesting to see how well they wipe off between his work days. I can update this review once he's worn them a bit more.
For now they have been perfect for versatility, size was true to size (I did order 1/2 size up, but only did that because he's growing so fast!) and they are definitely a great fit to a budget!!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
★★★★★ 5
Perfect Lounge Pants
Size: 4X-Large, Color: Black Heather, Number of Items: 1
These pants are so soft and comfortable for wearing around the house. Light enough for wear during the summer and for layering in cooler temperatures. They stretch in all the right places for a very comfortable fit and are well made. Would definitely buy again.
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Reviewed in the United States on May 15, 2026
★★★★★ 5
Soft and Comfortable Lounge Pants
Size: Large, Color: Black, Number of Items: 1
These sweatpants are soft, comfortable, and great for lounging around the house or running quick errands. The fleece lining adds warmth without feeling too heavy, and the elastic bottoms give them a nice fit. The pockets are a great addition and are deep enough to hold everyday essentials.
The fit was true to size, and they've held up well through multiple washes. A comfortable pair of sweatpants for everyday wear.
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Reviewed in the United States on May 31, 2026
★★★★★ 4
Material quality getting worse.
Size: 3X-Large, Color: Navy, Number of Items: 1
Our household has been buying Fruit of the Loom sweatpants for at least 15 years. So I ordered these this year. Yes, they're soft, comfortable and fit right, and good price. But after only 3 wearings, the material began to pill. I checked my older pairs, which have never pilled. The oldest are a 50-50 blend, the ones bought 2 years ago are 45 cotton, 55 polyester. The new ones are 40 cotton, 60 polyester. So I guess that's the difference. I don't expect them to last as long. Sorry, FOTL, you could have gotten a 5 star rating from me if you hadn't skimped on the material.
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Reviewed in the United States on January 15, 2026
★★★★★ 5
Perfect Fit for My 370 lb son. Soft, Durable, No Shrinking, Incredibly Comfortable!
Size: 4X-Large, Color: Black Heather, Number of Items: 1
I can’t speak highly enough about these Fruit of the Loom Eversoft Fleece Elastic Bottom Sweatpants. I purchased them for my 370 lb family member, who wears a 4X, and these are truly the only pants I’ve ever seen him feel completely comfortable in. They look great too and have pockets! Shopping for someone of his size has always been a challenge, especially finding pants that don’t dig in, feel soft, and hold up over time. His weight pools mostly around his waist and ankles, making it even harder to find something that fits without being tight or restrictive in those areas. But these sweatpants? Absolute perfection.
The material is made from 60% cotton and 40% polyester fleece, which creates this super soft, cozy texture on the inside, while the outside has a smooth, durable finish. The Eversoft technology really delivers on comfort—no scratchy feeling, just a nice, breathable fabric that keeps him warm without overheating.
One of the biggest selling points for us is that they do not dig into the waist or ankles at all—which, again, is so important for someone whose weight is concentrated in those areas. The waistband is wide, stretchy, and soft with a functional drawstring, so it adjusts without pinching or feeling tight. The elastic at the ankles has enough give to keep the pants in place without constricting, even with larger ankles. That’s rare to find in extended sizes where elastic bands can often be too tight and uncomfortable.
We’ve washed these multiple times (always following the care instructions—cold water, gentle cycle, and tumble dry low), and they have not shrunk or lost their shape. The fleece stays soft, the seams hold up, and there’s no pilling or fading so far. Another bonus: no foul odor when they arrive (which I’ve experienced with other brands in the past). They come fresh and ready to wear right out of the bag.
I’ve already ordered more pairs because these are the only pants my family member wants to wear while working on stabilizing his thyroid condition and managing his weight. They give him comfort, dignity, and confidence, which is priceless.
If you have a larger family member, or you’re someone with similar sizing needs, do not hesitate to try these. They check every box: softness, fit, durability, easy care, and true comfort where it matters most.
Thank you, Fruit of the Loom, for making inclusive, thoughtful clothing that truly accommodates real bodies. These sweatpants have made a real difference in my family member’s daily comfort.
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Reviewed in the United States on April 28, 2025
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