Brand New Rackstation NAS – FULL RS3621xs+, RS3621RPxs and RS4021xs+ Specifications Revealed
Good news for those looking at purchasing a new generation rackmount NAS from Synology, with the news that their 2017 generation XS rackstation series has been replaced with a new 2021 range, resulting in the new RS3621xs+, RS4021xs+ and RS3621RPxs Rackstation NAS. These three NAS systems were already revealed a little over 2 weeks ago on NASCompares (forgive the self-plug!) but only now have the specifications been fully fleshed out. These systems are very similar to their previous generation in a few ways, with only small but significant changes between the respective generations in architecture in the case of each device. These product families have always been some of the heaviest hitting system’s in their portfolio, producing the very best experience of DSM as a whole, as well as all of the 3rd party platform support we have come to expect. In fact, last year I publish a video regarding the best multi-user 4K and 8K editing solution for post production companies for £10K and the predecessor to the new RS4021xs+ was that very NAS. Therefore I am interested in seeing what the newer generation can do in order to top this. Let’s take a closer look.
What Are the Hardware Specifications of theRS3621xs+, RS3621RPxs and RS4021xs+ NAS?
Although the DSM (Diskstation Manager) software is really where the bulk of the innovation in a Synology NAS comes from, it would be remiss not to remember that you still need some high-grade hardware at your disposal, to provide both incredible performances, inside and out. All three of the RS3621xs+, RS3621RPxs and RS4021xs+ provide an Intel Xeon (Broadwell) based server system at 6/8 cores, up to 64GB of memory and arrive with a multitude of network connectivity options, PCIe upgradability and storage potential. Each is scaled to prioritize Storage, Power or Both. Take a look at the specifications below:
Note: Green Text means that it is the best option of the three NAS units in this field.
CPU Architecture | |||
Synology RS3621RPxs | Synology RS3621xs+ | Synology RS4021xs+ | |
CPU Model | Intel Xeon D-1531 | Intel Xeon D-1541 | Intel Xeon D-1541 |
CPU Architecture | 64-bit | 64-bit | 64-bit |
CPU Frequency | 6-core 2.2 (base) / 2.7 (turbo) GHz | 8-core 2.1 (base) / 2.7 (turbo) GHz | 8-core 2.1 (base) / 2.7 (turbo) GHz |
Hardware Encryption Engine (AES-NI) | YES | YES | YES |
System Memory | 8 GB DDR4 ECC UDIMM | 8 GB DDR4 ECC UDIMM | 16 GB DDR4 ECC UDIMM |
Memory Module Pre-installed | 8 GB (8 GB x 1) | 8 GB (8 GB x 1) | 16 GB (16 GB x 1) |
Total Memory Slots | 4 | 4 | 4 |
Maximum Memory Capacity | 64 GB (16 GB x 4) | 64 GB (16 GB x 4) | 64 GB (16 GB x 4) |
Drive Bays | 12 | 12 | 16 |
Maximum Drive Bays with Expansion Unit | 36 (RX1217/RX1217RP x 2) | 36 (RX1217/RX1217RP x 2) | 40 (RX1217/RX1217RP x 2) |
Compatible Drive Type* (See all supported drives) |
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Ports and Connections | |||
Hot Swappable Drive | YES | YES | YES |
RJ-45 1GbE LAN Port | 4 (with Link Aggregation / Failover support) | 4 (with Link Aggregation / Failover support) | 4 (with Link Aggregation / Failover support) |
RJ-45 10GbE LAN Port | NO | 2 (with Link Aggregation / Failover support) | 2 (with Link Aggregation / Failover support) |
USB 3.2 Gen 1 Port | 2 | 2 | 2 |
Expansion Port | 2 | 2 | 2 |
PCIe Expansion | 2 x Gen3 x8 slots (x8 link) | 2 x Gen3 x8 slots (x8 link) | 2 x Gen3 x8 slots (x8 link) |
Internal Drives |
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Form Factor (RU) | 2U | 2U | 3U |
Size (Height x Width x Depth) | 88 mm x 482 mm x 724 mm | 88 mm x 482 mm x 724 mm | 132.3 mm x 482 mm x 656.5 mm |
Weight | 14.5 kg | 14.5 kg | 17.4 kg |
Rack Installation Support* | 4-post 19″ rack (Synology Rail Kit – RKS1317) | 4-post 19″ rack (Synology Rail Kit – RKS1317) | 4-post 19″ rack (Synology Rail Kit – RKS1317) |
Notes | The rail kit is sold separately | The rail kit is sold separately | The rail kit is sold separately |
System Fan | 80 mm x 80 mm x 4 pcs | 80 mm x 80 mm x 4 pcs | 80 mm x 80 mm x 3 pcs |
Noise Level* | 50.2 dB(A) | 50.2 dB(A) | 44.7 dB(A) |
Scheduled Power On / Off | YES | YES | YES |
Wake on LAN / WAN | YES | YES | YES |
Power Supply Unit / Adapter | 500 W | 500 W | 800 W |
Redundant Power Supply | YES | YES | YES |
Power Consumption* | 140.01 W (Access) 65.94 W (HDD Hibernation) |
142.5 W (Access) 72.76 W (HDD Hibernation) |
145.79 W (Access) 62.68 W (HDD Hibernation) |
Warranty | 5 Years | 5 Years | 5 Years |
What Are the Software Specifications of theRS3621xs+, RS3621RPxs and RS4021xs+ NAS?
The software performance of the Synology RS3621xs+ and RS4021xs+ are (on the whole) greater than that of the RS3621RPxs, largely thanks to the increased available hardware inside, improved external connectivity with 10Gbe and/or the larger available storage. That said, none of the three systems is exactly taking it easy and all provide easily the best performance and depth of ability of ANY Synolgoy NAS I have seen for a long time. Aside from the hardware featured in one of two or the Flash or SAS based systems in the rackstation portfolio, these three rackmount NAS in the Synology 2021 range are pretty incredible. Here is a breakdown of what they can do in both 1st party and 3rd party applications:
Storage Management | |||
Synology Model ID | Synology RS3621RPxs | Synology RS3621xs+ | Synology RS4021xs+ |
Maximum Internal Volume Number | 128 | 256 | 256 |
SSD Read / Write Cache (White Paper) | YES | YES | YES |
SSD TRIM | YES | YES | YES |
RAID Group | YES | YES | YES |
Supported RAID Type |
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File Services | |||
File Protocol | CIFS/AFP/NFS/FTP/WebDAV | CIFS/AFP/NFS/FTP/WebDAV | CIFS/AFP/NFS/FTP/WebDAV |
Maximum Concurrent CIFS/AFP/FTP Connections | 2,000 | 2,000 | 4,000 |
Maximum Concurrent CIFS/AFP/FTP Connections (with RAM expansion) | 10,000 | 10,000 | 10,000 |
Windows Access Control List (ACL) Integration | YES | YES | YES |
NFS Kerberos Authentication | YES | YES | YES |
Account & Shared Folder | |||
Maximum Local User Accounts | 16,000 | 16,000 | 16,000 |
Maximum Local Groups | 512 | 512 | 512 |
Maximum Shared Folder | 512 | 512 | 512 |
Maximum Shared Folder Sync Tasks | 32 | 32 | 32 |
High Availability | |||
Synology High Availability | YES | YES | YES |
Log Center | YES | YES | YES |
Syslog Events per Second | 3,000 | 3,000 | 3,000 |
Virtualization | |||
VMware vSphere with VAAI | YES | YES | YES |
Windows Server 2016 | YES | YES | YES |
Windows Server 2019 | YES | YES | YES |
Citrix Ready | YES | YES | YES |
OpenStack | YES | YES | YES |
General Specifications |
Synology Model ID |
Synology RS3621RPxs |
Synology RS3621xs+ |
Synology RS4021xs+ |
Antivirus by McAfee (Trial) | YES | YES | YES |
Central Management System | YES | YES | YES |
Synology Chat | YES | YES | YES |
Maximum Users | 4,000 | 6,000 | 6,000 |
Maximum Concurrent Download Tasks | 80 | 80 | 80 |
exFAT Access (Optional) | YES | YES | YES |
iSCSI Manager | |||
Maximum iSCSI Target Number | 256 | 256 | 256 |
Maximum iSCSI LUN | 512 | 512 | 512 |
iSCSI LUN Clone/Snapshot, Windows ODX | YES | YES | YES |
Synology MailPlus / MailPlus Server | YES | YES | YES |
Free Email Accounts | 5 (Licenses required for additional accounts) | 5 (Licenses required for additional accounts) | 5 (Licenses required for additional accounts) |
Maximum Number of Concurrent Users | 800 | 800 | 1,100 |
Maximum Server Performance | 4,235,000 emails per day, approx. 129GB | 4,235,000 emails per day, approx. 129GB | 4,312,000 emails per day, approx. 131GB |
Media Server | YES | YES | YES |
DLNA Compliance | YES | YES | YES |
Moments | YES | YES | YES |
Facial Recognition | YES | YES | YES |
Subject Recognition | YES | YES | YES |
Auto Color & Rotate | YES | YES | YES |
Moments Select | YES | YES | YES |
Snapshot Replication | YES | YES | YES |
Maximum Snapshots per Shared Folder | 1,024 | 1,024 | 1,024 |
Maximum of System Snapshots | 65,536 | 65,536 | 65,536 |
Surveillance Station | YES | YES | YES |
Maximum IP cam (Licenses required) | 75 (including 2 Free License) (See All Supported IP Cameras) | 90 (including 2 Free License) (See All Supported IP Cameras) | 90 (including 2 Free License) (See All Supported IP Cameras) |
Total FPS (H.264) | 2250 FPS @ 720p (1280×720) 2100 FPS @ 1080p (1920×1080) 1500 FPS @ 3M (2048×1536) 900 FPS @ 5M (2591×1944) 550 FPS @ 4K (3840×2160) |
2700 FPS @ 720p (1280×720) 2250 FPS @ 1080p (1920×1080) 1500 FPS @ 3M (2048×1536) 900 FPS @ 5M (2591×1944) 550 FPS @ 4K (3840×2160) |
2700 FPS @ 720p (1280×720) 2250 FPS @ 1080p (1920×1080) 1500 FPS @ 3M (2048×1536) 900 FPS @ 5M (2591×1944) 550 FPS @ 4K (3840×2160) |
Total FPS (H.265) | 2250 FPS @ 720p (1280×720) 2250 FPS @ 1080p (1920×1080) 2250 FPS @ 3M (2048×1536) 1500 FPS @ 5M (2591×1944) 900 FPS @ 4K (3840×2160) |
2700 FPS @ 720p (1280×720) 2700 FPS @ 1080p (1920×1080) 2250 FPS @ 3M (2048×1536) 1500 FPS @ 5M (2591×1944) 1080 FPS @ 4K (3840×2160) |
2700 FPS @ 720p (1280×720) 2700 FPS @ 1080p (1920×1080) 2250 FPS @ 3M (2048×1536) 1500 FPS @ 5M (2591×1944) 1080 FPS @ 4K (3840×2160) |
Synology Drive | YES | YES | YES |
Recommended Number of Hosted Files | 3,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) | 5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) | 5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) |
Recommended Number of Concurrent Sync Clients | 1,800 (the number of connections that can be maintained when the recommended number of hosted files was reached) | 2,000 (the number of connections that can be maintained when the recommended number of hosted files was reached) | 2,000 (the number of connections that can be maintained when the recommended number of hosted files was reached) |
Synology Office | YES | YES | YES |
Maximum Users | 3,000 | 3,000 | 3,000 |
Video Station | YES | YES | YES |
Virtual Machine Manager | YES | YES | YES |
Recommended Virtual Machine Instances | 12 (Learn more) | 16 (Learn more) | 16 (Learn more) |
Recommended Virtual DSM Number (Licenses required) | 12 (including 1 Free License) | 16 (including 1 Free License) | 16 (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. | The specifications vary depending on system configuration and memory size. |
VPN Server | YES | YES | YES |
Maximum Connections | 40 | 40 | 40 |
When will the Synology RS3621xs+, RS362RP1xs and RS4021xs+ NAS Be Released and How Much?
Even a casual google of these three Synology rackstation solutions will show you that prices and a release window have been stated online and, now that Synology has published these items on their respective worldwide websites, that means that these three systems are effectively available NOW. So, to confirm, multiple sites have listed the price at the Synology RS3621RPXS – € 3,317.50 (TBC*), the Synology RS3621XSP – € 4,144.00 (TBC*) and the Synology RS4021XSP – € 5,177.50 (TBC*). Other prices shown online have differed higher and lower, which only again shows that you should WAIT till more official sources move forward on pricing and release. No doubt distribution feeds will iron out these pries into something much more concrete. So, it is probably best to hold off doing anything proactive with your budget, or if you are in a pinch, the RS3617RPxs/xs+ and RS4017xs+ are still fantastically viable solutions. Stay tuned!
*To Be Confirmed, also may not factor in tax, logistics or any % added between suppliers and resellers in individual regions
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Now that the RS versions have been released, has there been any word from Synology on updates to the DS3617? I’d love to be able to get an RS3621, but my enclosure just isn’t deep enough, but I do have space to just rest a DS on the bottom. I’ve been waiting to upgrade my old DS410 for a while now, and if I’m going to make the investment, I want the newest to last the longest.