- High-performance, general purpose storage solution for small to medium sized businesses

Features
SECURE STORAGE FOR YOUR BUSINESS
- Synology RS2421+/RS2421RP+ are versatile 2U 12-bay storage servers designed to accommodate a diverse set of business environments
- Scalable up to 24 drives, they are designed for cost-effective file management and sharing and include powerful backup capabilities designed for businesses with a growing data footprint
- The unit delivers 2.200 MB/s 64K sequential read and 1154 MB/s sequential write performance, and can be optionally enhanced with SSD cache and 10/25Gb Ethernet

HIGH PERFORMANCE STORAGE FOR ANYTHING
- Over 106K/59K random read/write IOPS and up to 2.200/1.154 MB/s sequential read/write throughput ensure ample performance for demanding workloads

CUSTOMIZE TO SUIT
- Easily adapt the RS2421+/RS2421RP+ to any business environment by adding faster networking, local SSD cache, or storage capacity

SERVING REMOTE WORKFORCES
- Keep your remote workforce connected with powerful out-of-the-box solutions for collaboration, file sharing, and communication

STORAGE FOR VIRTUALIZATION
- DSM streamlines provisioning for and management of virtual machines with full certification for VMware vSphere, Microsoft Hyper-V, Citrix XenServer, and OpenStack virtualization environments
- Synology Storage Console for VMware or Windows platforms lets you manage storage directly from your hypervisor
- VMware VAAI integration and Windows ODX help offload storage operations and speed up data transfer

WORKS BEST WITH SYNOLOGY DRIVES
- Engineered to handle intensive 24/7 workloads, Synology drives consistently deliver top-grade performance

POWERED BY SYNOLOGY DiskStation MANAGER
- The web-based DiskStation Manager (DSM) operating system supports a host of native productivity and management solutions

Hardware Specifications
CPU
- CPU Model: AMD Ryzen V1500B
- CPU Quantity: 1
- CPU Architecture: 64-bit
- CPU Frequency: 4-core 2.2 GHz
- Hardware Encryption Engine (AES-NI): Yes

MEMORY
- System Memory: 4GB DDR4 ECC UDIMM
- Memory Module Pre-installed: 4GB (4GB ×1)
- Total Memory Slots: 2
- Maximum Memory Capacity: 32GB (16GB ×2)

STORAGE
- Drive Bays: 12
- Maximum Drive Bays with Expansion Unit: 24 (RX1217/RX1217RP ×1)
- Compatible Drive Type:
* 3.5" SATA HDD
* 2.5" SATA HDD
* 2.5" SATA SSD
- Maximum Single Volume Size: 108 TB
- Hot Swappable Drive: Yes

EXTERNAL PORTS
- RJ-45 1GbE LAN Port: 4 (with Link Aggregation / Failover support)
- USB 3.2 Gen 1 Port: 2
- Expansion Port: 1
* The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019

PCIe
- PCIe Expansion: 1× Gen3 x8 slot (x4 link)

FILE SYSTEM
- Internal Drives: Btrfs, EXT4
- External Drives: Btrfs, EXT4, EXT3, FAT, NTFS, HFS+, exFAT

APPEARANCE
- Form Factor (RU): 2U
- Size (H×W×D): 88×482×552 mm
- Weight: 11.5 kg
- Rack Installation Support: 4-post 19" rack (Synology Rail Kit - RKS1317)
* The rail kit is sold separately

OTHERS
- System Fan: 60×60 mm ×3 pcs
- Fan Speed Mode: Full-Speed Mode, Cool Mode, Quiet Mode
- Easy Replacement System Fan: Yes
- Power Recovery: Yes
- Noise Level: 50.1 dB(A)
- Scheduled Power On / Off: Yes
- Wake on LAN / WAN: Yes
- Power Supply Unit / Adapter: 500 W
- AC Input Power Voltage: 100 V to 240 V AC
- Power Frequency: 50/60 Hz, Single Phase
- Power Consumption: 79.56 W (Access) 34.89 W (HDD Hibernation)
- British Thermal Unit: 271.65 BTU/hr (Access) 119.13 BTU/hr (HDD Hibernation)

TEMPERATURE
- Operating Temperature: 0°C to 35°C (32°F to 95°F)
- Storage Temperature: -20°C to 60°C (-5°F to 140°F)
- Relative Humidity: 5% to 95% RH

CERTIFICATION
- FCC, CE, BSMI, EAC, CCC, KC, UL, VCCI, RCM

ENVIRONMENT
- RoHS Compliant

PACKAGING CONTENT
1× Main Unit
1× Accessory Pack
1× AC Power Cord
1× Quick Installation Guide

OPTIONAL ACCESSORIES
- DDR4 ECC UDIMM: D4EU01-4G/D4EC-2666-8G/D4EC-2666-16G
- Expansion Units: RX1217/RX1217RP
- 3.5" SATA HDD: HAT5300
- 2.5" SATA SSD: SAT5200
- M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1
- M.2 SSD Adapter Card: M2D20
- 25GbE Network Interface Card: E25G21-F2
- 10GbE Network Interface Card: E10G21-F2/E10G18-T2/E10G18-T1
- Rail Kit Sliding: RKS1317
- VisualStation: VS960HD/VS360HD
- Surveillance Device License Pack

Software Specifications
STORAGE MANAGEMENT
- Maximum Internal Volume Number: 64
- SSD Read / Write Cache (White Paper): Yes
- SSD TRIM: Yes
- 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, RAID 6
- Global Hot Spare Supported RAID Type: Synology Hybrid RAID, RAID 1, RAID 5, RAID 6, RAID 10

FILE SERVICES
- File Protocol: SMB/AFP/NFS/FTP/WebDAV
- Maximum Concurrent SMB/AFP/FTP Connections: 1.000
- Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion): 2.000
- Windows Access Control List (ACL) Integration: Yes
- NFS Kerberos Authentication: Yes

ACCOUNT & SHARED FOLDER
- Maximum Local User Accounts: 2.048
- Maximum Local Groups: 256
- Maximum Shared Folder: 512
- Maximum Shared Folder Sync Tasks: 16

HIGH AVAILABILITY
- Synology High Availability: Yes

LOG CENTER
- Syslog Events per Second: 1.000

VIRTUALIZATION
- VMware vSphere with VAAI: Yes
- Windows Server 2016: Yes
- Windows Server 2019: Yes
- Citrix Ready: Yes
- OpenStack: Yes

GENERAL
- 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

Add-on Packages
- Antivirus by McAfee (Trial): Yes
- Central Management System: Yes
- Document Viewer: Yes
- Video Station: Yes

SYNOLOGY CHAT
- Maximum Users: 1.500
* The number of concurrent HTTP connections for Synology Chat was configured to the maximum
* For tested models with expandable memory, the maximum amount of RAM was installed

DOWNLOAD STATION
- Maximum Concurrent Download Tasks: 80

SAN MANAGER
- Maximum iSCSI Target Number: 128
- Maximum LUN: 256
- LUN Clone/Snapshot, Windows ODX: Yes
* iSCSI Manager has been renamed to SAN Manager in DSM 7.0

SYNOLOGY MailPlus / MailPlus SERVER
- Free Email Accounts: 5 (Licenses required for additional accounts)
- Maximum Number of Concurrent Users: 150
- Maximum Server Performance: 1.484.000 emails per day, approx. 45GB

MEDIA SERVER
- DLNA Compliance: Yes

SYNOLOGY PHOTOS
- Facial Recognition: Yes

SNAPSHOT REPLICATION
- Maximum Snapshots per Shared Folder: 1.024
- Maximum of System Snapshots: 65.536

SURVEILLANCE STATION
- Maximum IP cam (Licenses required): 40 (including 2 Free License)
- Total 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)
- Total 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)

SYNOLOGY DRIVE
- Recommended Number of Hosted Files 50.000.000 (applies to files indexed or hosted by Synology Drive
- Recommended Number of Concurrent Sync Clients: 550 (the number of connections that can be maintained when the recommended number of hosted files was reached)

SYNOLOGY OFFICE
- Maximum Users: 1.800

VIRTUAL MACHINE MANAGER
- Recommended Virtual Machine Instances: 8
- Recommended Virtual DSM Number (Licenses required): 8 (including 1 Free License)

VPN SERVER
- Maximum Connections: 30

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