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Edward Colville
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ES SFF chassis installed cleanly and works as expected.
K2R81A
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HP MSA 2040 ES SFF Chassis
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Name:
K2R81A
- Description:
- HP MSA 2040 ES SFF Chassis
- Rating:
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- Brand:
- Hpe
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K2R81A Overview
K2R81A is an enterprise-grade SAN storage system featuring 16 drive bays that accommodate a mix of SATA HDD, SAS HDD, SATA SSD, and NVMe SSD options with a total capacity of up to 512 TB. It supports multiple RAID configurations including RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10, is powered by an Intel Xeon processor with 8 cores, and comes with 16 GB of pre-installed ECC DDR4 memory that can be expanded up to 128 GB.
K2R81A offers versatile connectivity with interfaces such as USB 3.0, Thunderbolt, 10GbE Ethernet, and Fibre Channel, and it provides robust network support with 10GbE and 4 LAN ports. Designed for critical use cases like SMB backup, enterprise data centers, virtualization, and media servers, it features expansion support, redundant active cooling, and a dual redundant power supply rated at 350W to ensure maximum uptime and scalability.
K2R81A price is is available on request. Get immediate quote.
Request bulk order quote for K2R81A for additional pricing. Browse the full Hpe Msa Storage Controllers series or explore all Hpe products.
K2R81A Specifications
- Depth
- 28 inches
- Width
- 17 inches
- Weight
- 45 lbs
- Height
- 3 inches
- Form Factor
- Rackmount
- RAM Type
- ECC DDR4
- Hot-Swap Support
- Yes
- Power Supply
- Redundant
- Cooling
- Active
- Virtualization Ready
- Yes
- LAN Ports
- 4
- RAID Support
- RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10
- Max RAM Capacity
- 128 GB
- Power Supply Wattage
- 350W
- Product Type
- Storage System
- Storage Type
- SAN
- Supported Drive Types
- Mixed
- CPU Type
- Intel Xeon
- CPU Cores
- 8
- Installed RAM
- 16 GB
- Network Ports
- 10GbE
- Expansion Support
- Yes
- Operating System
- Custom OS
- Snapshot Support
- Yes
- Cloud Sync Support
- Yes
- iSCSI Support
- Yes
- Surveillance Support
- No
- Use Case
- Enterprise Data Center
- Max Supported Capacity
- 512 TB
- USB Ports
- USB 3.0
- Bay Count
- 16-bay
- Product Name
- K2R81A
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| K2R81A |  Q2R19A |  Q1J79A |  Q1J28A |  AW592B | |
|---|---|---|---|---|---|
| Product Type | Storage System | Storage System | Storage System | Storage System | Storage System |
| Storage Type | SAN | NAS | SAN | SAN | NAS |
| Form Factor | Rackmount | Rackmount | Rackmount | Rackmount | Rackmount |
| Bay Count | 16-bay | 8-bay | 16-bay | 12-bay | 8-bay |
| Supported Drive Types | Mixed | Mixed | Mixed | Mixed | Mixed |
| Hot-Swap Support | Yes | Yes | Yes | Yes | Yes |
| Max Supported Capacity | 512 TB | 128 TB | 512 TB | 512 TB | 512 TB |
| RAID Support | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 |
| CPU Type | Intel Xeon | Intel Xeon | Intel Xeon | Intel Xeon | Intel Xeon |
| CPU Cores | 8 | 8 | 8 | 8 | 8 |
| Installed RAM | 16 GB | 16 GB | 16 GB | 16 GB | 16 GB |
| Max RAM Capacity | 128 GB | 128 GB | 64 GB | 128 GB | 64 GB |
| RAM Type | ECC DDR4 | ECC DDR4 | ECC DDR4 | ECC DDR4 | DDR4 |
| Network Ports | 10GbE | 10GbE | 10GbE | 10GbE | 10GbE |
| LAN Ports | 4 | 2 | 4 | 4 | 4 |
| USB Ports | USB 3.0 | USB 3.0 | USB 3.0 | USB 3.2 | USB 3.2 |
| Expansion Support | Yes | Yes | Yes | Yes | Yes |
| Cooling | Active | Active | Redundant Fan | Redundant Fan | Redundant Fan |
| Power Supply | Redundant | Redundant | Redundant | Redundant | Redundant |
| Power Supply Wattage | 350W | 500W | 750W | 750W | 750W |
| Operating System | Custom OS | Custom OS | Custom OS | Custom OS | Custom OS |
| Snapshot Support | Yes | Yes | Yes | Yes | Yes |
| Cloud Sync Support | Yes | Yes | Yes | Yes | Yes |
| Virtualization Ready | Yes | Yes | Yes | Yes | Yes |
| iSCSI Support | Yes | Yes | Yes | Yes | Yes |
| Surveillance Support | No | Yes | No | Yes | No |
| Use Case | Enterprise Data Center | Enterprise Data Center | Enterprise Data Center | Enterprise Data Center / Virtualization / Media Server | Enterprise Data Center |
| Product Name | K2R81A | Q2R19A Storage Appliance | Q1J79A Storage System | Q1J28A Enterprise Storage System | AW592B High Performance NAS |
| Height | 3 inches | 3 inches | 3 inches | 3 inches | 2 inches |
| Width | 17 inches | 17 inches | 17 inches | 17 inches | 17 inches |
| Depth | 28 inches | 28 inches | 28 inches | 28 inches | 24 inches |
| Weight | 45 lbs | 50 lbs | 45 lbs | 45 lbs | 45 lbs |
Reviews & Ratings
H
Henry Dawson
4
Good enclosure for expanding existing systems.
J
Julian Reed
4
Solid build and reliable airflow.
M
Marcus Blake
5
No issues after installation.
O
Oliver Grant
4
Dependable storage chassis.
Questions & Answers
What is the HP MSA 2040 ES SFF Chassis (SKU: K2R81A)?
The HP MSA 2040 ES SFF Chassis (SKU: K2R81A) is a high-performance, dual-controller storage array that delivers enhanced I/O acceleration and energy-efficient, small form factor drive support for midrange SAN environments.
What does “ES” stand for in the HP MSA 2040 ES SFF Chassis?
“ES” stands for Enterprise SAS, indicating an optimized back-end for dual-port SAS 12 Gb/s drives that ensures higher reliability and performance under demanding workloads.
How many drive bays does the HP MSA 2040 ES SFF Chassis support?
The chassis supports up to 24 small form factor (2.5-inch) drive bays, enabling dense storage of SAS, SSD, and SED drives in a 2U rack space.
What maximum raw capacity can be achieved with this chassis?
With 24 bays populated by 10 TB SAS or SSD drives, the HP MSA 2040 ES SFF Chassis can deliver up to 240 TB of raw storage capacity.
Which drive types are compatible with the HP MSA 2040 ES SFF Chassis?
It supports 12 Gb/s SAS hard drives, 12 Gb/s SAS SSDs, and self-encrypting drives (SEDs) for flexible performance and security options.
What host interfaces are available on the HP MSA 2040 ES SFF Chassis?
The system features dual active/active controllers with optional 16 Gb Fibre Channel or 10/25 Gb iSCSI network interface cards to meet varied connectivity needs.
Can the HP MSA 2040 ES SFF Chassis be expanded?
Yes, you can scale storage by adding up to two MSA 2040 expansion enclosures, increasing drive capacity to 72 total bays in a clustered configuration.
What RAID levels does the HP MSA 2040 ES SFF Chassis support?
It supports RAID 0, 1, 5, 6, and 10, providing a balance of performance, capacity efficiency, and data protection.
How does the HP MSA 2040 ES SFF Chassis improve performance?
The chassis leverages enterprise SAS back-end, multi-core controllers, and adaptive flash caching to deliver up to 360,000 IOPS with sub-millisecond latency.
What management tools are included with the HP MSA 2040 ES SFF Chassis?
The system includes the intuitive HP StoreEasy GUI, CLI, and RESTful API for simplified provisioning, monitoring, and automation.
What are the physical dimensions and weight of the chassis?
The unit measures 2U height, 440 mm depth, 482 mm width and weighs approximately 18.8 kg (empty chassis with controllers installed).
What is the typical power consumption of the HP MSA 2040 ES SFF Chassis?
Typical power draw is 150 W under average load, with redundant hot-plug power supplies providing up to 750 W capacity for peak demand and failover.
What operating systems and hypervisors are supported?
The chassis is validated for Windows Server, VMware vSphere, Red Hat Enterprise Linux, and SUSE Linux Enterprise Server with Native Fibre Channel and iSCSI drivers.
Does the HP MSA 2040 ES SFF Chassis include encryption?
Yes, it supports controller-based data at rest encryption with FIPS 140-2 certified self-encrypting drives for secure data protection.
What warranty and support options are available for SKU K2R81A?
The product includes a three-year parts, labor and on-site support warranty, with optional Proactive Care and Foundation Care service packs for extended coverage.
How do I migrate data to the HP MSA 2040 ES SFF Chassis?
Use the HP StoreEasy migration tool or host-independent LUN migration to transfer data seamlessly from existing arrays without downtime.
Where can I purchase the HP MSA 2040 ES SFF Chassis (K2R81A)?
You can buy directly through HP’s authorized channel partners or the official HP online store, which offers real-time stock and pricing information.