Synology RX1225RP 12-Bay 40tb Expansion Enclosure 10x4tb WD Red Plus HDD Drives Installed

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Synology Burn-In Tested Hard Drive Storage Array Models and Configurations
CLICK HERE FOR Synology MODEL COMPARISONClick Here to view the Synology model comparison.This Will Open a New Tab/Window In Your Browser		Synology RX1225RP External Expansion DriveClick Here To See More Information and Specifications for the Synology RX1225RP External Expansion Drive.This Will Open a New Tab/Window In Your Browser
40tb - 40000gb - 10 x 4000gb 3.5" Western Digital HDD Drives Installed
 
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CLICK HERE FOR 44tbClick Here To View the Synology RX1225RP External Expansion Drive in a 44tb 11x4000gb Configuration with Similar Installed Installed Drives.
CLICK HERE FOR 36tbClick Here To View the Synology RX1225RP External Expansion Drive in a 36tb 9x4000gb Configuration with Similar Installed Drives.
VIEW ALL CONFIGURATIONSClick Here To View All Available Synology RX1225RP External Expansion Drive Fully Assembled and Tested Populated Configurations that Include Installed Drives.

 
REPLACES DISCONTINUED RX1223RP
 
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Synology RX1225RP External Expansion Drive 40tb 12-Bay RackMount Large Business / Enterprise Expansion Enclosure 10x4tb Western Digital Red Plus WD40EFPX 3.5 5400rpm SATA 6Gb/s HDD NAS Class Drives Installed - Burn-In Tested RX1225RP External Expansion Drive
Synology RX1225RP External Expansion Drive 12-Bay Expansion Enclosure Burn-In Tested ConfigurationsSynology RX1225RP External Expansion Drive 12-Bay Expansion Enclosure Burn-In Tested ConfigurationsSynology RX1225RP External Expansion Drive 12-Bay Expansion Enclosure Burn-In Tested ConfigurationsSynology RX1225RP External Expansion Drive 12-Bay Expansion Enclosure Burn-In Tested ConfigurationsSynology RX1225RP External Expansion Drive 12-Bay Expansion Enclosure Burn-In Tested ConfigurationsSynology RX1225RP External Expansion Drive 12-Bay Expansion Enclosure Burn-In Tested Configurations
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Device TypeThis is the type of device - (N)etwork (A)ttached (S)torage, (D)irect (A)ttached (S)torage, (N)etwork (V)ideo (R)ecorder, or Expansion Enclosure. Expansion Enclosure
Environment Large Business / Enterprise
Form Factor RackMount
Number of Drive Bays 12 Bays
Supported Drive Types 3.5" SATA-HDD 2.5" SATA-SSD
Max Internal Storage Capacity 360tb
USB 3.1 Gen-1 Type-C Ports 1
Synology WarrantyThis device is fully covered under warranty by Synology.CLICK FOR MORE INFORMATION 5 YearsThis device is fully covered under warranty for 5 years by Synology.CLICK FOR MORE INFORMATION
Device UPC GTIN 846504005475
 
CLICK HERE FOR MORE INFORMATION ABOUT THE Synology RX1225RP External Expansion DriveClick Here For More Information and Specifications about the Synology RX1225RP External Expansion Drive.This Will Open a New Tab/Window In Your Browser
 
ASSEMBLED CONFIGURATION SPECIFICATIONS

ALL POPULATED DEVICES ARE FULLY ASSEMBLED AND TESTED PRIOR TO SHIPMENT

 

Number of Installed Drives 10 DrivesInstalled Drive Form FactorPOPular3.5"
Each Installed Drive CapacityPOPular4tb - 4000gbInstalled Drive Speed 5400rpm
Total Populated Storage Capacity 40tb - 40000gbInstalled Drive Interface TypePOPularSATA 6Gb/s
Installed Drive Make and SeriesPOPularWestern Digital Red PlusInstalled Drive TechnologyPOPularHDD - Standard Mechanical Drive
Installed Drive Model WD40EFPXInstalled Drive Cache Buffer 256mb Cache Buffer
Installed Drive Warranty 3 YearsInstalled Drive Class NAS SPECIFIC CLASS DRIVES
WANT MORE STORAGE CAPACITY?
WANT LESS STORAGE CAPACITY?
WANT A DIFFERENT INSTALLED DRIVE OR CONFIGURATION?

CLICK HERE FOR 44tbClick Here To View the Synology RX1225RP External Expansion Drive in a 44tb 11x4000gb Configuration with Similar Installed Drives.
CLICK HERE FOR 36tbClick Here To View the Synology RX1225RP External Expansion Drive in a 36tb 9x4000gb Configuration with Similar Installed Drives.
VIEW ALL CONFIGURATIONSClick Here To View All Available Synology RX1225RP External Expansion Drive Fully Assembled and Tested Populated Configurations that Include Installed Drives.

 
WOULD YOU PREFER DIFFERENT NAS CLASS INSTALLED HARD DRIVES?
CLICK HEREClick Here To View the Synology RX1225RP External Expansion Drive in a Similar Configuration using NAS CLASS Installed Drives.

WOULD YOU PREFER A SIMILAR CONFIGURATION WITH SEAGATE INSTALLED HARD DRIVES?
CLICK HEREClick Here To View the Synology RX1225RP External Expansion Drive in a 40tb 10x4000gb Configuration with Seagate Installed Drives.
price $4037 synology rx1225rp external expansion drive 12-bay buy 40tb rackmount expansion enclosure 10x4000gb 10x4tb western digital red plus wd40efpx 3.5 5400rpm sata 6gb/s hdd drives installed burn-in tested 846504005475 nas headquarters buy network attached hard drive storage array server device das new raid-5 free shipping usa black friday cyber monday week month christmas holiday sale rx1225rp rx1225rp+ rx1225rp+ combo nas headquarters buy network attached hard drive storage array server device das new raid-5 free shipping usa black friday cyber monday week month christmas holiday sale rx1223rp rx1223rp+ rx1223rp+ combo 11/26/2025 6:06:42 AM
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$4657
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SPARE DRIVES and DRIVE TRAYS
Spare WD WD40EFPX 4000gb Drive Included
+$118
Spare WD WD40EFPX 4000gb Drive with Drive Tray Included
+$196
2 Spare WD WD40EFPX 4000gb Drives Included
+$236
2 Spare WD WD40EFPX 4000gb Drives with Drive Trays Included
+$392