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Compact black four-bay desktop NAS with matte finish and front drive trays

Synology Inc.

Synology Inc. DS925+ 4-bay NAS 4GB DDR4

SKU CH-12MF-QNCDD MPN DS925+

A four-bay desktop NAS with 4 GB DDR4 ECC memory, dual 2.5GbE ports and up to 522/565 MB/s sequential speeds for multi-user file sharing and backup

  • TypeDesktop NAS
  • HDD Interface4 x SATA (4 x Bay)
  • Form Factor4-bay;4GB DDR4 ECC SODIMM
  • Installed Memory4-bay;4GB DDR4
  • Max Memory Capacity32 GB (16 GB x 2)
  • Memory Slot2 x DDR4 SODIMM

Model DS925+

  • Four drive bays expand storage up to nine drives
  • 4 GB DDR4 ECC memory scales to 32 GB
  • Dual 2.5GbE ports with link aggregation
  • 522 MB/s read and 565 MB/s write speeds
  • Diskless design lets you choose drives

Four-bay desktop NAS for home and small offices

The Synology DS925+ is a diskless four-bay desktop NAS designed for users who want a personal cloud for file sharing, media streaming and backup. It ships with 4 GB of DDR4 ECC SODIMM memory installed and two SODIMM slots that support expansion up to 32 GB.

Tool-less drive trays and dual 2.5GbE ports

Drive installation uses tool-less trays that slide into the four SATA bays, so adding or replacing disks requires no screws. Two built-in 2.5GbE RJ-45 ports provide link aggregation for failover or load balancing, but the unit has no 10GbE or SFP+ connectivity for faster uplinks.

SATA interface limits sequential throughput

The four SATA bays deliver up to 522 MB/s sequential read and 565 MB/s sequential write, which is the practical ceiling of the SATA interface itself. Workloads that demand sustained throughput beyond those figures will be constrained by the drive interface rather than the network ports.

Privalumai

  • Four drive bays expand storage up to nine drives
  • 4 GB DDR4 ECC memory scales to 32 GB
  • Dual 2.5GbE ports with link aggregation
  • 522 MB/s read and 565 MB/s write speeds
  • Diskless design lets you choose drives

Specifikacijos

BrandSynology
SeriesDiskStation
ModelDS925+
TypeDesktop NAS
HDD Interface4 x SATA (4 x Bay)
Form Factor4-bay;4GB DDR4 ECC SODIMM
Installed Memory4-bay;4GB DDR4
Max Memory Capacity32 GB (16 GB x 2)
Memory Slot2 x DDR4 SODIMM
Included HDD CapacityDiskless System
Supported ProtocolsSMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS
Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP,
CalDAV
Power100 V to 240 V AC
Power Consumption37.91 watts (Access)
12.33 watts (HDD Hibernation)
TemperatureOperating Temperature : 0°C to 40°C (32°F to 104°F)
Storage Temperature : -20°C to 60°C (-5°F to 140°F)
Humidity5% to 95% RH
FeaturesUp to 522 MB/s sequential read and 565 MB/s sequential write performance3 enables fast
file sharing, syncing, streaming, and backup for multiple users
Two 2.5GbE ports offer fast networking, with Link Aggregation supporting failover and load
balancing capabilities
Supports 4 x 2.5" SATA SSD and 3.5" SATA HDD7. Synology hard drives and SSDs are
designed to integrate seamlessly with Synology systems, delivering exceptional reliability
Expandable to 9 drives with Synology DX525expansion unit1
Two built-in M.2 slots provide SSD caching2 capability without occupying drive bays
UsageBackup & stream media through personal cloud
Dimensions166 mm x 199 mm x 223 mm
Weight2.26 kg
Package ContentsMain Unit X 1
Accessory Pack X 1
AC Power Adapter X 1
AC Power Cord X 1
RJ-45 LAN Cable X 2
Siuntos svoris3.70 kg
Pakuotės dydis279 × 254 × 254 mm

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How do I confirm the DS925+ is running correctly after setup?

Log into DSM and check that all four drive bays show healthy status, then verify network throughput reaches the rated 522 MB/s read and 565 MB/s write on the 2.5GbE ports.

What ships with the DS925+ and which drives must I buy separately?

The box contains the main unit, accessory pack, AC adapter, power cord and two RJ-45 cables; SATA hard drives or SSDs are not included and must be purchased separately.

Should I choose the 4 GB model or upgrade to the 32 GB maximum?

The DS925+ ships with 4 GB DDR4 ECC SODIMM and supports up to 32 GB via two slots; add memory only if you run virtual machines or heavy database workloads.

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