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| Brand | Samsung |
|---|---|
| Model | SM863a |
| Capacity | 480 GB |
| Usage Class | Write Intensive |
| Host Interface | SATA 6.0 Gbps |
|---|---|
| Total Interface Bandwidth | 6 Gb/s |
| Form Factor | 2.5" |
|---|
| NAND Flash | Samsung V-NAND 2-bit MLC |
|---|---|
| Drive Writes Per Day | 3.6 |
| Total Bytes Written | 3080 TBW |
| Sequential Read | 510 MB/s |
|---|---|
| Sequential Write | 485 MB/s |
| Random Read IOPS | 95000 |
| Random Write IOPS | 28000 |
| Average Latency | 95 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZ7KM480HMHQ-00005 |
|---|
Compared with the earlier MZ7KM480HMHQ-00005, the Samsung SM863a is a clear generational refinement toward higher enterprise endurance, combining 3.6 DWPD and 3,080 TBW with Samsung V-NAND 2-bit MLC for a longer useful life in write-intensive deployments. It also pushes the SATA 6.0 Gbps interface close to saturation at 510/485 MB/s while delivering 95,000/28,000 IOPS, giving it a stronger balance of sustained performance and durability than typical same-class SATA SSDs.
With an endurance rating of 3080 TBW and 3.6 DWPD, the MZ7KM480HMHQ is built for sustained enterprise write activity and can handle multiple full-drive writes per day throughout its service life. In typical server or OS-drive workloads, this level of endurance is far beyond normal demand, making it a very safe choice for long-term deployment and easily sufficient for use as a system disk for 10 years or more under standard write patterns. Its enterprise-grade reliability is reinforced by power-loss protection (PLP), which helps preserve in-flight data and metadata during an unexpected power failure, reducing the risk of corruption and downtime. An UBER of 1.0E-17, together with a 2 million-hour MTBF, indicates a very low probability of unrecoverable read errors and strong overall platform reliability for business-critical environments.
1. The SATA 6.0 Gbps interface, paired with up to 510 MB/s sequential read performance, provides a drop-in upgrade for legacy enterprise platforms that need faster boot, backup, and data streaming without changing existing storage infrastructure.
2. With random read performance reaching 95,000 IOPS, the drive can accelerate metadata-heavy workloads such as virtualization, OLTP databases, and high-concurrency application servers by reducing storage-side contention.
3. A 3.6 DWPD endurance rating makes it well suited for write-intensive enterprise environments, supporting sustained daily overwrite cycles common in logging, caching, and transactional systems.
4. Samsung V-NAND 2-bit MLC flash offers a strong balance of endurance, consistency, and data integrity, making it a better fit than TLC-based alternatives for mission-critical business workloads.
5. The typical 95 µs latency helps deliver predictable application response times, which is especially valuable for latency-sensitive enterprise services that depend on steady QoS under load.
Lower-capacity reference: 240 GB Higher-capacity reference: 960 GB In the MZ7KM series, the 480 GB model is the practical sweet spot. Compared with the 240 GB version, it offers much better headroom for OS images, application growth, logs, and overprovisioning, reducing the risk of early capacity pressure in always-on enterprise workloads. Compared with the 960 GB option, it keeps acquisition cost and cost per deployed node under tighter control while delivering broadly similar enterprise SATA performance characteristics. It is well suited for mid-scale virtualization clusters, such as shared boot and application storage for about 40 to 60 business service instances.
Q: Is MZ7KM480HMHQ suitable for a write-heavy database server?
A: Yes. With 3.6 DWPD, 3080 TBW, Samsung V-NAND 2-bit MLC, and 95 µs typical latency, MZ7KM480HMHQ is well suited for write-intensive database and enterprise transactional workloads.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This SSD is rated for 3.6 full drive writes per day. For a 480 GB model, that equals about 1.73 TB of writes daily within its specified endurance rating.
Q: Does it include power loss protection (PLP) and why is that critical?
A: Yes, it includes power loss protection. PLP helps preserve in-flight data and metadata during unexpected outages, reducing corruption risk and improving data integrity in enterprise storage environments.
Q: What RAID level is recommended for this SSD?
A: RAID 10 is commonly recommended for this SSD in performance-critical servers, because it balances redundancy and speed. RAID 1 or RAID 5 may also fit capacity or budget priorities.