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New Synology RS2421+ and RS2821+ Rackstation Officially Released

The Synology RS2421+ and RS2821RP+ Rackstation NAS Server is Officially Revealed

Yes, although it might not come as a massive surprise (if you have been following NASCompares for the last few months), we can now officially reveal that the new Synology RS2421+ (RS2421RP+ 2 PSU version) 12-Bay NAS and RS2421RP+ 16-Bay Rackmount NAS have been released. Now, it should be stated that they have initially been revealed over in the east first, but no doubt that means they will appear in the US and Europe very shortly. So, what will we be seeing in these new rackstation solutions from Synology, will there be any surprises for us? Well, if you are all clued up on the RS1221+, DS1821+, DS1621+ and other Ryzen V1500B based NAS that the brand has released in the last 6 months, then there isn’t a huge number of surprised here – but that is not necessarily a bad thing! Even a casual glance at the specifications reveals a robust and rugged selection of hardware on offer, with the familiar range of storage options on Day 1/1000 that existed in the Atom-based RS2418+ and RS2818RP+ that came before. So, let’s take a look at what these two rackmount NAS for SMB users has to offer.

Synology RS2821RP+ & RS2421+ Rackstation NAS Hardware Specifications

The hardware specifications on a Synology NAS can often be treated and a secondary priority (with the glaringly obvious focus by the brand on their First Party DSM platform, software and services). Inside the RS2421+ and RS2821RP+, it is incredibly similar in architecture to that of the more compact 8-Bay RS1221+ released right at the start of 2021. Obviously, a more storage equipped system in 12 and 16 Bays results in a much more beefy cooling system and larger chassis design, but aside from these factors, the RS2421RP+ and RS2821RP+ are pretty familiar turf. Good solutions, but definitely continuing to toe the line of Synology hardware releases for SMB users in 2020/2021. Let’s take a closer look:

Hardware Specifications
Synology RS2421+ / RS2421RP+ NAS Synology RS2821RP+ NAS

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Processor model AMD Ryzen V1500B AMD Ryzen V1500B
Number of CPUs 1 1
Processor architecture 64-bit 64-bit
Processor clock 4-core 2.2 GHz 4-core 2.2 GHz
Hardware encryption engine (AES-NI) YES YES
Memory
System memory 4 GB DDR4 ECC UDIMM 4 GB DDR4 ECC UDIMM
Pre-installed memory modules 4 GB (4 GB x 1) 4 GB (4 GB x 1)
Total memory slots 2 2
Maximum memory capacity 32 GB (16 GB x 2) 32 GB (16 GB x 2)
Storage device
Number of Disk Slots 12 16
Maximum number of disk bays for installing expansion units 24 (RX1217/RX1217RP x 1) 28 (RX1217/RX1217RP x 1)
Compatible Disk Type
  • 3.5″ SATA HDD
  • 2.5″ SATA HDD
  • 2.5″ SATA SSD
  • 3.5″ SATA HDD
  • 2.5″ SATA HDD
  • 2.5″ SATA SSD
Maximum single storage capacity 108 TB 108 TB
External port
RJ-45 1GbE network port 4 (Support Link Aggregation / Failover) 4 (Support Link Aggregation / Failover)
USB 3.2 Gen 1 port* 2 2
Expansion port 1 1
PCIe
PCIe expansion 1 x Gen3 x8 slot (x4 link) 1 x Gen3 x8 slot (x4 link)
File system
Internal disk
  • Btrfs
  • EXT4
  • Btrfs
  • EXT4
Exterior
Dimensions (rack unit) 2U 3U
Size (Height X Width X Depth) RS2421+: 88 mm x 482 mm x 552 mm
RS2421RP+: 88 mm x 482 mm x 578 mm
132.3 mm x 482 mm x 656.5 mm
weight RS2421+: 11.5 kg
RS2421RP+: 11.9 kg
17.1 kg
System fan 60 mm x 60 mm x 3 pcs 80 mm x 80 mm x 3 pcs
Fan mode
  • Full speed mode
  • Low temperature mode
  • Silent mode
  • Full speed mode
  • Low temperature mode
  • Silent mode
Replaceable system fan YES YES
Automatic power recovery YES YES
Noise value RS2421+: 50.1 dB(A)
RS2421RP+: 54 dB(A)
53.5 dB(A)
Timer switch YES YES
Wake on LAN YES YES
Power supply/transformer RS2421+: 500 W
RS2421RP+: 350 W
550 W
Dual power supply RS2421+: No
RS2421RP+:  Yes
Yes
Power consumption power RS2421+: 79.56 W (Access)
34.89 W (HDD hibernation)
RS2421RP+: 91.76 W (Access)
48.21 W (HDD hibernation)
97.54 W (Access)
49.57 W (HDD Hibernation)

So, there is a breakdown of the hardware, let’s see how that architecture affects software and services in the Synology RS2821+ and RS2421+ NAS.

Synology RS2421+ & RS2821RP+ Rackstation NAS – Software Specifications

Obviously, a much more detailed breakdown of the hardware inside the RS2821RP+ and RS2421+ will arrive in our review down the line, but for now, we can use the official specifications pages to get a good understanding of how much these two NAS systems will be able to perform and provide in DSM 6.2/7.0 (beta still!). Below is the breakdown:

DSM product specifications
Synology RS2421+ / RS2421RP+ NAS Synology RS2821RP+ NAS
Maximum storage space 64 64
Support RAID disk array type
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
File service
File agreement SMB/AFP/NFS/FTP/WebDAV SMB/AFP/NFS/FTP/WebDAV
Maximum number of simultaneous SMB/AFP/FTP connections 1,000 1,000
Maximum number of simultaneous SMB/AFP/FTP connections (equipped with extended memory) 2,000 2,000
Windows Access Control List (ACL) integration YES YES
NFS Kerberos authentication YES YES
Accounts and shared folders
Maximum number of local user accounts 2,048 2,048
Maximum number of local groups 256 256
Maximum number of shared folders 512 512
Maximum shared folder synchronization task 16 16
High availability
Synology High Availability YES YES
Log center YES YES
Logs received per second 800 800
Virtualization support
VMware vSphere with VAAI YES YES
Windows Server 2016 YES YES
Windows Server 2019 YES YES
Citrix Ready YES YES
OpenStack YES YES
Additional suite View full list of packages
Antivirus by McAfee (Trial) YES YES
Central Management System YES YES
Synology Chat YES YES
Maximum number of users 1,500 1,500
Document Viewer YES YES
Download Station YES YES
Maximum number of download tasks 80 80
exFAT Access (optional) YES YES
iSCSI Manager / SAN Manager
Maximum number of iSCSI targets 128 128
Maximum number of iSCSI LUNs 256 256
iSCSI LUN Clone/Snapshot, Windows Offload Data Transfer (ODX) YES YES
Synology MailPlus / MailPlus Server YES YES
Number of free email accounts 5 (If you want to have more email accounts, you need to purchase additional authorization) 5 (If you want to have more email accounts, you need to purchase additional authorization)
Maximum number of simultaneous online 150 150
Maximum server performance 1,484,000 emails/day, about 45GB 1,484,000 emails/day, about 45GB
Media Server YES YES
DLNA compatible YES YES
Moments YES YES
Face recognition YES YES
Subject identification YES YES
Automatic color correction and angle correction YES YES
Moments carefully selected YES YES
Snapshot Replication YES YES
Maximum number of snapshots supported by a single shared folder 1,024 1,024
Maximum number of system snapshots 65,536 65,536
Surveillance Station
Maximum number of camera support channels (camera authorization required) 40 (including 2 sets of free licenses) (check compatible IP cameras) 40 (including 2 sets of free licenses) (check compatible IP cameras)
Frames per second (FPS) (H.264) 1200 FPS @ 720p (1280×720)
1050 FPS @ 1080p (1920×1080)
600 FPS @ 3M (2048×1536)
440 FPS @ 5M (2591×1944)
320 FPS @ 4K (3840×2160)
1200 FPS @ 720p (1280×720)
1050 FPS @ 1080p (1920×1080)
600 FPS @ 3M (2048×1536)
440 FPS @ 5M (2591×1944)
320 FPS @ 4K (3840×2160)
Frames per second (FPS) (H.265) 1200 FPS @ 720p (1280×720)
1200 FPS @ 1080p (1920×1080)
1120 FPS @ 3M (2048×1536)
600 FPS @ 5M (2591×1944)
480 FPS @ 4K (3840×2160)
1200 FPS @ 720p (1280×720)
1200 FPS @ 1080p (1920×1080)
1120 FPS @ 3M (2048×1536)
600 FPS @ 5M (2591×1944)
480 FPS @ 4K (3840×2160)
Synology Drive YES YES
Synology Office YES YES
Maximum number of users 1,800 1,800
Video Station YES YES
Virtual Machine Manager YES YES
Recommended number of virtual machines 8 (see more) 8 (see more)
Recommended number of Virtual DSMs (authorization required) 8 (including 1 free license) 8 (including 1 free license)
Remarks This specification varies depending on the system configuration and the amount of memory. This specification varies depending on the system configuration and the amount of memory.
VPN Server YES YES
Maximum number of connections 30 30

So, certainly, the RS2421+/RS2421RP+ and RS2821RP+ are a step up on the RS2418+ and RS2818RP+ in terms of performance, thanks to that Ryzen V1500B over the Intel Atom C3538 before. But real testing will have to wait till we have the hardware.

Synology RS2421RP+ and RS2821RP+ Rackstation NAS – Price and Release Date

Given the pricing (globally) of the predecessors to the RS2421+ and RS2821RP+, as well as the price at which the 2020/2021 series 6/8 Bay Diskstation/Rackstation systems entered the market at – I think these new Rackstations will arrive on the market at a very similar price point to their 2018 counterparts, maybe at 5% increase at the top. So, that would be (APPROXIMATELY!) around £1550+ for the RS2421+, then £1750 for the RS2421RP+ and £2500 for the RS2821RP+ NAS. Of course, I would recommend holding out till launch for more precise pricing worldwide. Regarding release, the fact that these two systems have arrived on the official Taiwan Synology pages, means that these must be reading for full global release in the coming weeks.

Hardware Specifications
Synology RS2421+ / RS2421RP+ NAS Synology RS2821RP+ NAS

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