Synology

Synology RXD1215sas 12-Bay RackStation Expansion Unit

Expand Your Storage Capacity with the Synology RXD1215sas Expansion Unit The Synology RXD1215sas is a 12-bay rackmount expansion unit designed to seamlessly integrate with the RackStation RC18015xs+ high availability cluster. It provides a shared storage pool, eliminating the need for data replic...

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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

Expand Your Storage Capacity with the Synology RXD1215sas Expansion Unit

The Synology RXD1215sas is a 12-bay rackmount expansion unit designed to seamlessly integrate with the RackStation RC18015xs+ high availability cluster. It provides a shared storage pool, eliminating the need for data replication and enabling easy scalability up to 180 HDDs.

Specifications:

  • Number of Bays: 12
  • Compatibility: Synology RC18015xs+
  • Scalability: Up to 15 RXD1215sas units
  • Drive Support: SAS/SATA HDDs/SSDs

Key Features

Data protection by snapshot

SSD cache support

Scale up to 180 drives with 15 Synology RXD1215sas

Expansion unit for RC18015xs+

Specifications

Model
RXD1215sas
Drive Bays
12-Bay
Compatibility
Synology RC18015xs+
Max Scalability
Up to 180 drives (with 15 units)
Features
Data protection by snapshot, SSD cache support
Form Factor
RackStation Expansion Unit

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Pros & Cons

👍 Pros

  • Allows for significant storage expansion for the RC18015xs+, scaling up to 180 drives with multiple units.
  • Supports SSD cache, which can enhance the performance of frequently accessed data.
  • Offers data protection through snapshot functionality, providing recovery points for stored information.
  • Specifically designed to integrate seamlessly with the Synology RC18015xs+ RackStation.
  • Provides a high-density storage solution in a rack-mounted form factor.

👎 Cons

  • Requires the existing Synology RC18015xs+ to function, as it is an expansion unit.
  • The maximum expansion of 180 drives necessitates 15 RXD1215sas units, representing a substantial investment.
  • "Data protection by snapshot" implies a feature of the overarching system, not a standalone feature of the expansion unit itself.
  • Requires significant infrastructure considerations for power and rack space due to its 12-bay capacity.
  • Does not include drives, requiring separate purchase and installation of storage media.

Frequently Asked Questions

The Synology RXD1215sas is a 12-bay rackstation expansion unit specifically designed to scale up the storage capacity of a Synology RC18015xs+.
When used with the RC18015xs+, the system can be scaled up to 180 drives by utilizing 15 Synology RXD1215sas expansion units.
Yes, the RXD1215sas supports SSD cache, which can help improve the performance of data access.
This unit supports data protection by snapshot, offering a method to preserve and restore data to previous points in time.
No, the RXD1215sas is an expansion unit and requires the Synology RC18015xs+ to function as part of a larger storage system.