QNAP REXP-1620U-RP 12Gbps SAS RAID Expansion Enclosure for QNAP NAS



Simple & flexible storage expansion for QNAP NAS

The REXP-1620U-RP expansion enclosure is designed for expanding the storage space on a QNAP NAS* by connecting multiple expansion enclosures via high-speed mini SAS cables. Featuring a 12 Gbps SAS interface on the chassis, the REXP-1620U-RP ensures fast data passthrough from 12 Gbps SAS-enabled QNAP NAS even when using 6Gbps hard drives. This is especially useful for large data applications that require high performance interconnection, such as video surveillance, archiving large data, and TV broadcast storage.

  • Plug and use, seamless capacity expansion.
  • Missing mode protection.
  • High density, high efficiency and high scalability.
  • Flexible management with the QTS Storage Manager.
  • Backup storage for the QNAP NAS.
  • Supports SAS 12 Gbps, SAS/SATA 6 Gbps HDD and SSD.
  • Backward compatible with a 6 Gbps SAS-enabled NAS / REXP expansion unit and 6 Gbps SAS HBA by using the 12Gb/s SAS for 6Gb/s SAS cable (CAB-SAS10M-8644-8088).

Plug and use, seamless capacity expansion

Simply connect a REXP-1620U-RP to a QNAP NAS* and power it on. The QNAP NAS will detect the hard drives in the REXP-1620U-RP as newly-installed local drives. You can seamlessly expand and manage the NAS capacity by using the powerful QTS Storage Manager.

*The QNAP NAS must be using QTS 4.2 (or a newer version).

Missing mode protection

When the disconnection of a RAID expansion enclosure is detected, the NAS blocks IO access to protect data. The system can recover from missing mode to its normal state with the data staying intact.

High density, high efficiency and highly scalable

The REXP-1620U-RP supports 16 hard drives and 128TB raw capacity in 3U rack space. The REXP-1620U-RP has three SAS wide ports for host connectivity and daisy-chaining respectively. Each SAS wide port combines four SAS channels (maximum 8 SAS channels supported per expansion enclosure), with each supporting 12Gbps full duplex speed. The solution delivers unprecedented performance of up to 48Gbps per host connection.

Powerful QTS Storage Manager

The QTS Storage Manager neatly presents tools and options for managing system storage with an intuitive graphical user interface, which simplifies the process of NAS capacity expansion and REXP-1620U-RP management. IT administrators can easily monitor the health of the REXP-1620U-RP and the disks within it. When cascading multiple expansion enclosures in a rack, the Locate Disk and Locate Enclosure functions assist IT administrators in quick maintenance.

An excellent backup solution for the QNAP NAS

In addition to expanding an existing volume, IT administrators can use the REXP-1620U-RP as a budget-friendly external storage to perform speedy and secure backup tasks for a QNAP NAS. The QNAP RTRR (Real-Time Remote Replication) or rsync service lets IT administrators back up NAS data to the REXP-1620U-RP on a real time or scheduled basis.

Flexible drive type and capacity

The REXP-1620U-RP offers high flexibility in hard drive selection. IT administrators can choose enterprise-level SAS HDDs with high performance and high reliability for mission-critical applications, low-cost but high-capacity SATA HDDs for large data archiving, or high-speed and high-stability SSDs for I/O-intensive operations.


Host Interface

Three SAS 12Gbps 4x wide port

Hard Drive

16x 3.5" SAS/SATA 12/6Gb/s, SAS/SATA 3Gb/s hard drive or 2.5" SAS/SATA SSD

LED Indicators

Front panel: Status, fault, system over heat, fan error

Rear panel: SAS link, SAS error, enclosure ID

Form Factor

3U rackmount

Dimensions (DxWxH) mm

130 (H) x 442.4 (W) x 528.3(D) mm

5.12 (H) x 17.42 (W) x 20.80 (D) inch


Net weight (NAS only): 18.14 kg/39.99 lb

Gross weight (with packing and accessories): 25.92 kg/57.14 lb

Sound Level*

Sound pressure (LpAm): 36.7 dB(A)




5~95% RH non-condensing, wet bulb: 27C

Power Consumption: In Operation


Power Supply

Redundant/ Hot Swap ATX Power Supply, 650W, 90-240Vac~, 50-60Hz


3 x 6 cm smart cooling fan (hot-swappable fan module)

 Front View

  1. Hard Drive Tray
  2. Hard Drive LEDs
  3. Tray Lock
  4. Release Button
  5. LED Indicators: System status, system fault, system over heat, fan error

Rear View

  1. COM Port (Reserved)
  2. Mini SAS Port (8644)
  3. Mini SAS Port (8644)
  4. Mini SAS Port (8644)
  5. Power Switch
  6. Enclosure ID
  7. Power Connection


The REXP-1220U-RP/REXP-1620U-RP complies with ANSI/EIA-RS-310-D rack mounting standards. Before purchasing the server racks for this model, please make sure the server racks conform to the following criteria:

1. Rack size

A.Mounting post width: = 450mm

B.Panel width: = 500mm

C.Mounting post depth: 650mm-850mm

2. The optional rack kits for the REXP-1220U-RP/REXP-1620U-RP are only compatible with square-hole server racks.

Software Specifications

Expansion Enclosure Management

QNAP Flexible Volume

The functions listed below are managed via the QNAP QTS operating system.

The disks, RAID Groups, storage pools, and volumes in the RAID expansion are configured via the QTS operating system.

1. Support for hard disks S.M.A.R.T. capacity

1. Support for multiple RAID groups in a storage pool to ensure data safety

2. RAID expansion enclosure LED identifier

2. Online storage pool expansion

3. Location indication of RAID expansion enclosure

3. Online volume expansion

4. Location indication of hard disks on RAID expansion enclosure

4. Block-based iSCSI LUN

5. Smart fan control

5. Support for thin-provisioned volume with space reclamation

6. In-band firmware update

6. Support for thin-provisioned iSCSI LUN with space reclamation

Intelligent Storage Manager

The QTS Storage Manager neatly presents tools and options for managing system storage with an intuitive graphical interface. From reviewing the system storage allocation in the Dashboard, to managing volumes, Storage Pools, disks and iSCSI storage, the Storage Manager provides a centralized place to ease the work of storage management.

Package Contents


0.5m SAS cable

Power cord x 2

Flat head screw x 64 (for 2.5" HDD)

Flat head screw x 64 (for 3.5" HDD)

Quick Installation Guide







No additional files, specification sheets, guides or documentation found for product.


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Warranty: 12 Month Return To Base

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