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ES SFF chassis installed cleanly and works as expected.
K2R81A
HP MSA 2040 ES SFF Chassis
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K2R81A
HP MSA 2040 ES SFF Chassis
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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.
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 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 |
ES SFF chassis installed cleanly and works as expected.
Good enclosure for expanding existing systems.
Solid build and reliable airflow.
No issues after installation.
Dependable storage chassis.
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.
“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.
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.
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.