Synology 12 Bay Rackstation RS3621RPXS (Diskless)

Synology RS3621RPXS

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RackStation XS Model RS3621RPXS

UPC Code: 846504004065

Provantage Code:  SYNO0K4

Condition:  Factory New

  • Product Type: SAN/NAS Storage System
  • Form Factor: Rack-mountable
  • Product Family: RackStation XS
  • Standard Memory: 8 GB
  • Number of Total Expansion Bays: 12
  • TAA Compliant: Yes

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Synology RS3621RPXS Specifications

    Synology 12 Bay Rackstation RS3621RPXS (Diskless)


    Rear View

    Safeguard your business assets

    Synology RS3621RPxs is a powerful 12-bay storage server. Its 6-core processor enables compute-intensive services while its redundant power, ECC memory, and Btrfs file system safeguard mission-critical data. Capable of delivering 189,098 4K random read IOPS and 4,718 MB/s sequential read throughput, it is ideal for small businesses.


    Intel® Xeon® D-1531 6-core 2.2 GHz


    4,718 MB/s seq. read 189,098 4K random read IOPS1


    Dual PCIe slots for 10GbE or NVMe cache


    Up to 36 drive bays with RX1217(RP)

    Reliability first

    Service continuity is at the core of the RS3621RPxs design.

    Redundant power

    Dual PSUs provide protection against a PSU failure or accidental cord removal while hot-swappable fans can be replaced without powering down the system.

    Near-zero downtime

    Synology High Availability (SHA) pairs two identical units together creating an active-passive cluster with minute-level failover.

    Next-generation file system

    Btrfs prevents data corruption and reduces maintenance overheads with advanced storage technologies and optimized snapshots.

    Customize to suit

    The two built-in PCIe slots allow users to customize the RS3621RPxs to satisfy unique performance, networking, and storage requirements.

    10GbE ready

    Support for 10GbE NICs expands the throughput of the unit by up to 5x times using link aggregation.

    SSD cache

    Boost read/write IOPS by up to 16 times by enabling SSD cache via our Synology M.2 NVMe adapter cards and SNV3000 Series SSDs or by installing one or more 2.5" SAT5200 SSDs.

    On-demand drive bays

    Expand to 36 drive bays using two RX1217(RP) expansion units with minimal intervention.

    License-free backup solutions

    Keep disaster at bay

    Hyper Backup

    A comprehensive backup and recovery solution for securing data stored on Synology servers. Backup data locally, to another Synology device, rsync server, or cloud-based storage such as Google Drive, Dropbox, S3-compatible destinations, and Synology C2. Deduplication, integrity checks, and incremental transfer technology reduce bandwidth and storage used.

    Snapshot Replication

    Easily schedule flexible point-in-time backups of shared folders and iSCSI LUNs with an RPO as low as 5 minutes and recovery in seconds. Set up replication and failover to other Synology storage systems for fast RTOs and minimal service disruption.

    Active Backup Suite

    Enables administrators to easily backup the entire IT infrastructure to their NAS, including Windows & Linux workstations and servers, file servers, VMware and Hyper-V virtual machines, and Microsoft 365 and Google Workspace accounts. Backups benefit from deduplication, multiversioning, and optimizations to reduce bandwidth and storage used.


    CIFS  –  AFP  –  NFS  –  FTP  –  WEBDAV  –  SMB 1.0  –  SMB 2.0  –  SMB 3.0  –  NFSv3  –  NFSv4  –  NFSv4.1  –  iSCSI  –  HTTP  –  HTTPS  –  SNMP  –  LDAP  –  CalDAV  –  DLNA

Additional Product Images


Product NameSynology 12 Bay Rackstation RS3621RPXS (Diskless)
Product TypeSAN/NAS Storage System
Processor ManufacturerIntel
RAID SupportedYes
Ethernet TechnologyGigabit Ethernet
Number of Total Expansion Bays12
Number of Total Expansion Slots2
Network (RJ-45)Yes
Maximum Power Supply Wattage500 W
Product FamilyRackStation XS
Total Number of USB Ports2
Number of Hard Drives Supported12
Number of Hard Drives Installed0
Expansion Slot TypePCI Express 3.0 x8
Rack Height2U
Form FactorRack-mountable
Processor Speed2.20 GHz
Processor TypeXeon
RAID Levels0, 1, 5, 6, 10, Basic, JBOD, RAID F1
Controller TypeSerial ATA
Standard Memory8 GB
Processor CoreHexa-core (6 Core)
Number of Power Supplies Installed2
Redundant Power SupplyYes
Number of Network (RJ-45) Ports4
Number of Solid State Drive Supported12
Number of Solid State Drive Installed0
Number of 2.5" / 3.5" Bays12
Number of USB 3.2 Gen 1 Ports2
Processor ModelD-1531
Country of OriginTaiwan
Memory TechnologyDDR4 SDRAM
Operating SystemDiskStation Manager
Product SeriesXS
Product ModelRS3621RPXS
Product LineRackStation
Packaged Quantity1
Supplies/Accessories for Synology RS3621RPXS

Synology 3.5 SATA Hard Disk Drive HAT5300 8TB

Mfg Part# HAT5300-8T

Synology Expansion for Rackstation RX1217 Diskless

Mfg Part# RX1217

Synology Ram DDR4-2666 ECC 16G ECC Unbuffered DIMM 260PIN 1.2V

Mfg Part# D4EC-2666-16G

Synology AC E10M20-T1 M.2 Adapter & 10 Gigabit Ethernet Card

Mfg Part# E10M20-T1

Synology 10GB Ethernet Adapter 1 RJ45PORT E10G18-T1

Mfg Part# E10G18-T1

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Synology RackStation XS Model RS3621RPXS