6 Best Alternatives to the QNAP TL-R1600PES-RP-US 16 Bay 3U (2026)
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If you are searching for qnap tl r1600pes rp us 16 bay 3u alternatives, you likely need high-capacity expansion that fits specific rack constraints. The original QNAP TL-R1600PES offers 16 drive bays in a short-depth 3U chassis with redundant power supplies. This design supports Mini-SAS HD connections for reliable data transfer. It is built to expand QNAP NAS storage to petabyte levels. However, you might want a different form factor or a lower bay count. Some users prefer a complete NAS instead of a JBOD unit. Others need smaller footprints for tight media cabinets. You might also seek different network speeds or pre-installed drives.
We selected these 6 products because their specifications overlap with the original unit’s core needs. The list includes other rackmount options from QNAP, Synology, and BUFFALO. You will find models with varying bay counts, from 4 to 16. Some options include built-in RAID controllers, while others remain simple expansion units. Each alternative addresses specific gaps, such as the need for redundant power or compact depth. Review the specs to find the right fit for your rack space and storage goals. This guide focuses on physical dimensions, connectivity, and capacity to help you compare.
Our top pick: QNAP TL-R1600PES 16-Bay Rackmount JBOD.
How each alternative compares
BUFFALO TeraStation 5420RN 4-Bay 32TB
The BUFFALO TeraStation 5420RN differs significantly by being an all-in-one NAS rather than a JBOD expansion unit. You get pre-installed 32TB of storage, removing the need to buy drives separately. It offers 10GbE connectivity, which is faster than the standard SATA speeds found in the QNAP TL-R1600PES. However, it only has four bays, so you lose the massive 16-bay capacity of the original. The chassis is also deeper and heavier. Choose this if you need high-speed networking and managed storage without handling individual drive procurement.
QNAP 8-Bay Short-Depth Rackmount NAS
This QNAP TS-855eU-RP is a fully functional 8-bay NAS, not just a drive enclosure. It includes 8GB of RAM and an 8-core processor, allowing it to run applications independently. It features 5GbE and 2.5GbE ports, offering more network flexibility than the original’s Mini-SAS HD links. You sacrifice half the drive bays for significant processing power. The 2U form factor is shorter than the 3U original but still requires rack space. Pick this if you need a compact, powerful NAS for small teams rather than pure storage expansion.
QNAP 8-Bay Rackmount NAS
The QNAP TS-873AeU is an 8-bay NAS with 2.5GbE speeds, designed for smaller offices. It lacks redundant power supplies, unlike the TL-R1600PES, which may affect uptime reliability. You get expansion slots for additional network cards, a feature not explicitly listed for the original JBOD. The single power supply makes it less robust for critical data centers. It is smaller and lighter than the 3U original. Select this option if you need a standalone NAS with modern networking speeds and do not require redundant power or 16-bay capacity.
Synology 2U Rackmount Redundant Power Expansion Unit
The Synology RX1217RP is a 2U expansion unit for Synology RackStation systems, not QNAP NAS devices. It provides 12 drive bays, which is less than the 16-bay original but still offers substantial capacity. It includes redundant power supplies, matching the reliability feature of the TL-R1600PES. The 2U form factor is significantly shorter than the 3U original, saving rack space. You must use it with Synology hardware, limiting compatibility. Choose this if you are in the Synology ecosystem and need a compact, redundant expansion unit for data centers.
QNAP TR-004U 4 Bay Rackmount NAS
The QNAP TR-004U is a 4-bay expansion unit in a 1U rackmount form factor. It is much smaller and lighter than the 16-bay TL-R1600PES, fitting into tight rack spaces. It connects via Mini-SAS HD, similar to the original, ensuring compatibility with QNAP NAS systems. You sacrifice 12 drive bays for a compact footprint. It lacks redundant power supplies, relying on a single unit. This is a good choice if you need minimal expansion capacity and have limited rack space, rather than requiring high-density storage.
QNAP 4 Bay 1U Rackmount SATA JBOD
The QNAP TL-R400S is a 4-bay 1U SATA JBOD, designed for compact expansion. It uses SATA interfaces, which is different from the Mini-SAS HD links on the original. The 1U height makes it much shorter than the 3U TL-R1600PES, ideal for tight spaces. You lose 12 drive bays and the Mini-SAS connectivity. It is suitable for Linux setups or QNAP systems needing small additions. Pick this if you need a low-profile SATA expansion unit and do not require the high capacity or SAS connectivity of the 16-bay original.
Quick picks
Our 7 picks
QNAP TL-R1600PES 16-Bay Rackmount JBOD
Best for: expanding QNAP NAS storage capacity
- Drive Bays
- 16-Bay
- Included Storage
- Diskless
- Form Factor
- Rackmount
- Hardware Interface
- SATA
- Dimensions
- 1 × 13 × 24 inches
View on Amazon: QNAP TL-R1600PES 16-Bay Rackmount JBOD Affiliate link
This QNAP TL-R1600PES-RP-US is a 16-bay rackmount JBOD enclosure designed for petabyte-level expansion. It supports SATA 6Gb/s drives and features redundant power supplies for service continuity. The short-depth design fits small media cabinets, though the rail kit is sold separately. It connects via Mini-SAS HD ports and includes a standard 5-year warranty. This unit suits users needing high-density storage expansion for existing QNAP NAS systems.
Pros
- Supports 16 x 3.5-inch SATA 6Gb/s drives
- Redundant power supplies ensure service continuity
- Short depth design fits small cabinets
- Connects via Mini-SAS HD ports
- Includes 5-year standard warranty
Cons
- Rail kit sold separately
- No mention of drive inclusion
- Requires separate QNAP NAS host
Good fit if
- You need to expand a QNAP NAS to petabyte levels
- You require redundant power for storage continuity
- You have space for a 3U rackmount enclosure
Skip if
- You need a standalone NAS with built-in drives
- You lack rackmount space or rails
- You require USB or Thunderbolt connectivity
Verdict: QNAP 16-Bay 3U Rackmount JBOD provides reliable, high-capacity expansion for QNAP NAS users who prioritize redundant power and short-depth installation in rack environments.
BUFFALO TeraStation 5420RN 4-Bay 32TB
Best for: businesses needing secure, high-capacity rackmount storage
- Drive Bays
- 4-Bay
- Network Connectivity
- Native 10GbE port
- Included Storage
- 32TB (4x8TB)
- RAID Support
- RAID 5, RAID 6, RAID 0
- Form Factor
- Rackmount
- Dimensions
- 7.9 × 23 × 21.3 inches
View on Amazon: BUFFALO TeraStation 5420RN 4-Bay 32TB Affiliate link
The BUFFALO TeraStation 5420RN is a 4-bay rackmount NAS designed for business environments. It ships with 32TB of storage (4x8TB drives) in a RAID 5 configuration, offering 24TB of usable space. The unit features a native 10GbE port for fast data transfers and includes 256-bit drive encryption. This closed-system solution supports snapshots and cloud sync with services like Azure and Dropbox, making it a secure option for teams needing reliable, high-capacity storage without the complexity of open-source setups.
Pros
- Includes 32TB of pre-installed NAS-grade hard drives
- Native 10GbE port for high-speed file transfers
- 256-bit drive encryption and two-factor authentication
- Snapshot feature for instant data recovery
Cons
- Only 4 bays compared to 16-bay alternatives
- Closed system limits custom software flexibility
- Larger physical footprint than desktop NAS units
Good fit if
- You need a high-capacity solution with drives included
- You require 10GbE connectivity for fast transfers
- You want enterprise-grade security features like encryption
Skip if
- You need more than 4 drive bays
- You prefer open-source NAS operating systems
- You want a compact desktop form factor
Verdict: BUFFALO TeraStation 5420RN 4-Bay 32TB NAS is a secure, all-in-one storage solution for businesses that need 10GbE speeds and high capacity without managing individual drives.
QNAP 8-Bay Short-Depth Rackmount NAS
Best for: Small teams needing 8-bay rackmount storage
- Drive Bays
- 8 Bay
- Network Connectivity
- Dual 2.5GbE
- Processor
- Intel Atom C5125
- RAM Capacity
- 8GB SODIMM DDR4
- M.2 NVMe Slots
- Dual M.2 PCIe Gen 3 x4 NVMe SSD slots
- Included Storage
- Diskless
View on Amazon: QNAP 8-Bay Short-Depth Rackmount NAS Affiliate link
This 8-bay rackmount NAS features an Intel Atom C5125 processor and 8GB of DDR4 RAM. It includes dual 2.5GbE ports and two M.2 NVMe slots for cache acceleration. The unit is designed for short-depth rack installation. It suits users needing expandable storage with dedicated network and SSD options for performance tuning.
Pros
- 8GB SODIMM DDR4 RAM with ECC support
- Dual 2.5GbE network ports
- Dual M.2 PCIe Gen 3 x4 NVMe slots
- Dual PCIe Gen 3 x4 expansion slots
Cons
- Limited to 8 drive bays
- Requires separate purchase of drives
- 8-core Intel Atom processor may limit heavy multitasking
Good fit if
- You need 8 drive bays in a rackmount form factor
- You want dual 2.5GbE connectivity
- You plan to use NVMe SSDs for caching
Skip if
- You require more than 8 drive bays
- You need a pre-loaded storage system
- You prefer 10GbE network connectivity
Verdict: QNAP TS-855eU-RP 8-Bay 2U Rackmount NAS provides a compact 8-bay solution with ample RAM and network flexibility for small to mid-sized teams needing scalable storage.
QNAP 8-Bay Rackmount NAS
Best for: small offices needing 2.5GbE speeds
- Drive Bays
- 8-Bay
- Network Connectivity
- 2x 2.5GbE
- Processor
- AMD Ryzen Embedded V1500B
- RAM Capacity
- 4GB DDR4
- Included Storage
- Diskless
- Form Factor
- Rackmount
View on Amazon: QNAP 8-Bay Rackmount NAS Affiliate link
This is an 8-bay rackmount NAS from QNAP. It uses an AMD Ryzen Embedded V1500B processor and includes 4GB of DDR4 RAM. The unit features dual 2.5GbE ports for faster network transfers. It also offers PCIe slots for expansion cards and multiple USB 3.2 Gen 2 ports. It suits users who need a compact, high-speed storage solution for small teams.
Pros
- 8-bay capacity for substantial local storage
- Dual 2.5GbE network ports for faster transfers
- AMD Ryzen Embedded V1500B 4-core processor
- PCIe Gen 3x8 slots for expansion cards
- USB 3.2 Gen 2 ports with 10Gb/s speeds
Cons
- Only 4GB of RAM included by default
- Single power supply unit
- Smaller 8-bay capacity compared to 16-bay alternatives
Good fit if
- You need a rackmount solution with 8 drives
- You want 2.5GbE networking speeds
- You require PCIe expansion options
Skip if
- You need more than 8 drive bays
- You require redundant power supplies
- You need more than 4GB of RAM without upgrading
Verdict: QNAP 8-Bay Rackmount NAS fits small offices needing 2.5GbE speeds and expansion slots, but you should skip it if you require redundant power or larger capacity.
Synology 2U Rackmount Redundant Power Expansion Unit
Best for: expanding Synology RackStation storage capacity
- Included Storage
- Diskless
- Dimensions
- 27.4 × 17 × 3.46 inches
- Weight
- 29.5 pounds
View on Amazon: Synology 2U Rackmount Redundant Power Expansion Unit Affiliate link
The Synology RX1217RP is a 2U diskless expansion chassis designed to increase storage capacity for your existing Synology RackStation. It features redundant power supplies to maintain service uptime during maintenance or failure. You can manage it directly through Synology DiskStation Manager (DSM) for seamless online volume expansion. This unit measures 17 inches wide and weighs 29.5 pounds, making it a substantial addition to your rack setup.
Pros
- Redundant power supplies for service uptime
- Online volume expansion on the fly
- Managed from Synology DiskStation Manager
- Plug-n-use design for seamless upgrade
Cons
- Diskless design requires separate hard drives
- Only compatible with Synology RackStation systems
- 2U height requires specific rack space
Good fit if
- You need to expand storage on a Synology RackStation
- You require redundant power for critical uptime
- You want to add capacity without downtime
Skip if
- You need a standalone NAS with drives included
- You use a non-Synology server platform
- You have limited rack space for a 2U unit
Verdict: Synology RX1217RP 2U Rackmount Expansion is a robust storage add-on for existing Synology RackStation users who need more space and power redundancy. It fits best in data centers where uptime is critical and drive procurement is handled separately.
QNAP TR-004U 4 Bay Rackmount NAS
Best for: expanding QNAP NAS storage in a rack
- Drive Bays
- 4 Bay
- Network Connectivity
- USB 3.0 Type-C
- Form Factor
- Rackmount
- Dimensions
- 21.3 × 16.5 × 7.87 inches
- Weight
- 4.41 pounds
View on Amazon: QNAP TR-004U 4 Bay Rackmount NAS Affiliate link
The QNAP TR-004U is a 4-bay rackmount expansion unit designed to add storage to your existing QNAP NAS. It supports up to four SATA drives and features a USB 3.0 Type-C port for faster data transfer. You can configure RAID settings using dip switches or the Storage & Snapshots Manager app. Its compact 1U form factor fits standard racks, making it a practical way to expand capacity without replacing your main system.
Pros
- Supports up to four SATA drives for expanded storage
- Includes USB 3.0 Type-C port for faster data transfer
- Lockable hard drive trays prevent accidental removal
- Dip switches allow hardware-based RAID configuration
- Integrates with QNAP NAS for centralized management
Cons
- Only holds four drives, limiting total capacity compared to larger enclosures
- Requires a host QNAP NAS; cannot operate as a standalone network drive
- Lacks built-in network ports for direct Ethernet connection
Good fit if
- You need to add more SATA storage to an existing QNAP NAS
- You want a compact 1U rackmount expansion unit
- You prefer hardware-based RAID configuration via dip switches
Skip if
- You need a standalone NAS without a host system
- You require more than four drive bays
- You want direct network connectivity via Ethernet ports
Verdict: The QNAP TR-004U 4 Bay Rackmount Expansion is a compact storage add-on for QNAP NAS users who need more drive bays in a 1U rackmount form factor. It fits users who want to expand capacity without buying a new NAS.
QNAP 4 Bay 1U Rackmount SATA JBOD
Best for: compact 1U SATA storage expansion
- Drive Bays
- 4-Bay
- Included Storage
- Diskless
- Form Factor
- Rackmount
- Hardware Interface
- SATA
- Dimensions
- 21.3 × 16.3 × 7.05 inches
View on Amazon: QNAP 4 Bay 1U Rackmount SATA JBOD Affiliate link
The QNAP TL-R400S is a 4-bay 1U rackmount SATA JBOD enclosure. It supports 3.5-inch SATA drives and includes a QXP-400eS-A1164 PCIe card for connection. This diskless unit expands storage for QNAP NAS, Windows, and Linux systems. Its 1U form factor fits standard racks. You should use this if you need compact, high-density storage expansion without managing a full NAS system.
Pros
- 1U rackmount form factor for space efficiency
- Includes QXP-400eS-A1164 PCIe SATA card
- Supports 4 x 3.5-inch SATA drives
- Compatible with QNAP NAS and Linux servers
Cons
- Smaller 4-bay capacity compared to 16-bay alternatives
- Diskless design requires separate drive purchase
- Limited to 1U height, restricting vertical space
Good fit if
- You need compact 1U storage expansion
- You use QNAP NAS or Linux servers
- You require SATA 6Gbps connectivity
Skip if
- You need more than 4 drive bays
- You want a pre-loaded NAS system
- You require tower form factor
Verdict: QNAP TL-R400S 4-Bay 1U Rackmount JBOD suits users needing compact SATA expansion for QNAP or Linux setups. It fits well in tight rack spaces but lacks the capacity of larger 16-bay units.
Specifications side by side
| Spec | QNAP TL-R1600PES 16-Bay Rackmount JBOD | BUFFALO TeraStation 5420RN 4-Bay 32TB | QNAP 8-Bay Short-Depth Rackmount NAS | QNAP 8-Bay Rackmount NAS | Synology 2U Rackmount Redundant Power Expansion Unit | QNAP TR-004U 4 Bay Rackmount NAS | QNAP 4 Bay 1U Rackmount SATA JBOD |
|---|---|---|---|---|---|---|---|
| Drive Bays | 16-Bay | 4-Bay | 8 Bay | 8-Bay | not stated | 4 Bay | 4-Bay |
| Network Connectivity | not stated | Native 10GbE port | Dual 2.5GbE | 2x 2.5GbE | not stated | USB 3.0 Type-C | not stated |
| Processor | not stated | not stated | Intel Atom C5125 | AMD Ryzen Embedded V1500B | not stated | not stated | not stated |
| RAM Capacity | not stated | not stated | 8GB SODIMM DDR4 | 4GB DDR4 | not stated | not stated | not stated |
| M.2 NVMe Slots | not stated | not stated | Dual M.2 PCIe Gen 3 x4 NVMe SSD slots | not stated | not stated | not stated | not stated |
| Included Storage | Diskless | 32TB (4x8TB) | Diskless | Diskless | Diskless | not stated | Diskless |
| RAID Support | not stated | RAID 5, RAID 6, RAID 0 | not stated | not stated | not stated | not stated | not stated |
| Form Factor | Rackmount | Rackmount | Rackmount | Rackmount | not stated | Rackmount | Rackmount |
| Hardware Interface | SATA | not stated | not stated | not stated | not stated | not stated | SATA |
| Number of Bays | not stated | 4-Bay | 8-Bay | 8-Bay | not stated | 4-Bay | 4-Bay |
| Processor Cores | not stated | not stated | 8-Core | not stated | not stated | not stated | not stated |
| Dimensions | 1 × 13 × 24 inches | 7.9 × 23 × 21.3 inches | 23 × 21 × 8 inches | not stated | 27.4 × 17 × 3.46 inches | 21.3 × 16.5 × 7.87 inches | 21.3 × 16.3 × 7.05 inches |
| Weight | not stated | 27.2 pounds | 9 pounds | not stated | 29.5 pounds | 4.41 pounds | not stated |
| Color | Multicolor | Black | Black or Gray | Black | Black | Black | black |
| Model | TL-R1600PES-RP-US | TS5420RN3204 | TS-855EU-RP-8G-US | TS-873AeU-4G-AM-US | RX1217RP | TR-004U | TL-R400S |
| Size | not stated | 32TB (4x8TB) | Short Rackmount-RP (Unav.) | Single Power | 2U x 24" x 36" | 4 Bay | 4 Bay |
Frequently asked questions
Can I use the BUFFALO TeraStation 5420RN as a direct replacement for the QNAP TL-R1600PES?
No, because they serve different roles. The QNAP unit is a JBOD expansion shelf that requires you to supply your own drives. The BUFFALO model is a complete NAS with pre-installed 32TB of storage. You cannot simply swap them without changing your storage management approach.
Which alternative offers the most RAM for small teams?
The QNAP TS-855eU-RP is the best choice for memory. It includes 8GB of RAM, which supports more demanding tasks. This 8-bay unit also features an 8-core processor and flexible network options. It fits small teams needing scalable storage in a compact 2U form factor.
Are there options with redundant power supplies besides the original QNAP?
Yes, the Synology RX1217RP and the QNAP TS-855eU-RP both offer redundant power. The Synology unit is a 2U expansion chassis designed for data centers. The QNAP 8-bay model provides similar reliability in a shorter depth, making it suitable for racks with space constraints.
What is the smallest rackmount expansion unit available?
The QNAP TR-004U is a compact 4-bay expansion unit. It fits into a 1U rack slot, saving vertical space. This model is ideal for QNAP users who need extra drive bays without installing a full-sized NAS. It weighs only 4.41 pounds for easy handling.
Can I expand my QNAP NAS with a Synology JBOD?
No, you cannot mix brands for direct expansion. The Synology RX1217RP is designed to expand Synology RackStation systems only. Similarly, QNAP JBODs like the TL-R1600PES or TR-004U are built to work with QNAP NAS devices. You must match the brand for compatibility.
Which alternative is best for budget-conscious small offices?
The QNAP TS-873AeU-4G-AM-US is the best budget option. It provides 8 bays and 2.5GbE speeds for small offices. However, it uses a single power supply, so it lacks redundancy. Skip this model if you require redundant power or higher capacity than 8 bays.
Does the BUFFALO TeraStation 5420RN require separate hard drives?
No, it comes with pre-installed storage. This 4-bay NAS includes 32TB of data already loaded on the drives. You do not need to purchase or install individual hard drives. This all-in-one design simplifies setup for businesses needing immediate high-capacity storage.
Is there a 1U option for SATA expansion?
Yes, the QNAP TL-R400S is a 1U rackmount JBOD. It supports SATA drives and fits in tight rack spaces. This 4-bay unit is suitable for compact expansions. It lacks the capacity of larger 16-bay units but offers a small footprint for specific setups.