Versatile and scalable storage
Synology RS2821RP+ is a 3U 16-bay storage server designed to accommodate a diverse set of business requirements. Scalable to 28 drives, the unit provides powerful backup and restoration functionality for the SMB sector. It delivers 2,200 MB/s sequential read and 105K 4K random read performance, and can be upgraded with SSD cache and 10/25Gb Ethernet options.

High performance storage for anything
Over 105K/59K random read/write IOPS and up to 2,220/1,164 MB/s sequential read/write throughput ensure ample performance for demanding workloads.

Built for reliability
Redundant power
Reduce the possibility of power disruptions on a single distribution channel or PDU adversely impacting data and service availability.

Near-zero downtime
Pair two identical devices with Synology High Availability and enable automatic minute-level failover between both devices in the event one server fails.

Data integrity and protection
ECC memory prevents data corruption, while the Btrfs file system brings higher reliability, snapshot technology, and simplified data protection.

Customize to suit
Easily adapt the RS2821RP+ to any business environment by adding faster networking, local SSD cache, or storage capacity.

10/25GbE ready
Support for 10/25GbE NICs lets you boost server throughput up to five times using Link Aggregation (bonding).

SSD cache
Boost read/write IOPS over HDD-only arrays by up to 16 times or more with NVMe or SATA SSD Cache

Serving remote workforces
Keep your remote workforce connected with powerful out-of-the-box solutions for collaboration, file sharing, and communication.

Synology Office
Create documents, spreadsheets, and slides in a multi-user environment. Real-time collaboration and automatic saving make remote work sessions a breeze.

Synology Chat
Chat and collaborate with colleagues using secure end-to-end encryption on with mobile, desktop, and browser clients.

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.

Technical details
Sustainability certificates	RoHS
Processor
Processor family	AMD Ryzen
Processor manufacturer	AMD
Processor model	V1500B
Processor frequency	2.2 GHz
Processor cores	4
Number of processors supported	1
Memory
Internal memory	4 GB
Internal memory type	DDR4
Maximum RAM supported	32 GB
Memory slots	2
Memory form factor	UDIMM
Flash memory	4000 MB
Ports & interfaces
Ethernet LAN (RJ-45) ports	4
USB port	Yes
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	2
PCI Express x8 (Gen 3.x) slots	1
Weight & dimensions
Width	482 mm
Depth	656.5 mm
Height	132.3 mm
Weight	17.1 kg
Power
Power supply location	Built-in
Power supply unit (PSU) capacity	550 W
Number of power supply units	1
Redundant power supply (RPS) support	Yes
Power consumption (typical)	97.54 W
Power consumption (HDD standby)	49.57 W
AC input voltage	100-240 V
AC input frequency	50 - 60 Hz
Operational conditions
Operating temperature (T-T)	0 - 35 °C
Operating relative humidity (H-H)	5 - 95%
Storage temperature (T-T)	-20 - 60 °C
Network
Ethernet LAN	Yes
Ethernet LAN data rates	1000 Mbit/s
Wake-on-LAN ready	Yes
Supported network protocols	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Link aggregation	Yes
Storage
Storage drives installed	No
Number of storage drives supported	16
Installed storage drive type	No
Supported storage drive types	HDD & SSD
RAID support	Yes
Supported storage drive interfaces	Serial ATA, Serial ATA II, Serial ATA III
Storage drive sizes supported	2.5,3.5"
Maximum supported storage capacity	108 TB
RAID levels	0, 1, 5, 6, 10, JBOD
Online RAID migration	Yes
Online RAID expansion	Yes
Hot-swap drive bays	Yes
Supported file systems	BTRFS, Fat, HFS+, NTFS, ext3, ext4
Certificates
Certification	FCC CE BSMI EAC CCC KC UL VCCI RCM
Software
Operating system installed	DiskStation Manager
Packaging content
Cables included	AC
Power cables quantity	2
Design
Chassis type	Rack (3U)
Cooling type	Active
Product colour	Black
Number of fans	3 fan(s)
Fan diameter	8 cm
Performance
Type	NAS
Device class	Large Enterprise Business
Backup function	Yes
Backup features	Cloud
Noise level	53.5 dB
Snapshot	Yes
Web-based management	Yes
Access Control List (ACL)	Yes
Reset button	Yes
On/off switch	Yes
System log	Yes
Logistics data
Harmonized System (HS) code	84714100