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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 | MZ-V7S250B/AM |
|---|
The Samsung SM863a 480GB (MZ7KM480HMHQ-00005) is engineered for read-intensive enterprise workloads that still demand strong write resilience, combining Samsung 2-bit MLC V-NAND with 3.6 DWPD / 3080 TBW, 510/485 MB/s sequential performance, and up to 95,000/28,000 IOPS on a broadly compatible SATA 6.0 Gbps interface. Compared with the older MZ-V7S250B/AM, it delivers roughly 92% more capacity and over 20× higher endurance, making it a far better fit for always-on database logs, virtualization boot pools, and mixed enterprise edge deployments where predictable lifespan matters more than peak burst speed.
With an endurance rating of 3080 TBW and 3.6 DWPD, the MZ7KM480HMHQ-00005 is designed for sustained write-intensive enterprise use rather than light client workloads. In practical terms, under typical server or system-disk workloads, this level of endurance provides long service life and can comfortably support many years of stable operation without endurance-related concern. For enterprise reliability, built-in Power Loss Protection (PLP) helps preserve in-flight data and protects metadata integrity if power is interrupted unexpectedly, reducing the risk of corruption or incomplete writes. Its UBER of 1.0E-17 indicates an extremely low unrecoverable bit error rate, supporting high data integrity expectations in business-critical storage environments.
1. The SATA interface ensures drop-in compatibility with mainstream enterprise servers and storage arrays, making this drive ideal for cost-efficient upgrades without changing existing backplanes or controllers.
2. Its near-saturation sequential read performance accelerates boot images, database scans, and large file delivery, helping reduce wait time in read-heavy business applications.
3. Strong random read capability combined with low typical latency enables faster response for virtual machines, OLTP databases, and metadata-intensive workloads where consistent access time matters most.
4. The enterprise-class endurance rating supports sustained daily write activity over years of service, making it well suited for caching, logging, and mixed-use data center deployments.
5. Samsung V-NAND 2-bit MLC provides a balanced foundation of durability, write consistency, and data retention, which is especially valuable for mission-critical environments that prioritize reliability over consumer-grade flash economics.
Lower-capacity reference: 240 GB Higher-capacity reference: 960 GB Capacity positioning analysis: In the SM863 family, the 480 GB model sits in the practical sweet spot. Compared with the 240 GB version, it gives noticeably better headroom for OS growth, logging, patches, and VM image expansion, reducing the risk of early capacity pressure. Compared with the 960 GB option, it keeps acquisition cost and fleet-wide budget under tighter control while delivering essentially the same enterprise-class sequential and random I/O behavior. This makes 480 GB especially well suited for medium-scale virtualization clusters, such as hosting boot volumes for about 40 to 60 application servers.
Q: Is MZ7KM480HMHQ-00005 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, this SSD is well suited for write-intensive database and enterprise server workloads.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: It is rated for 3.6 full drive writes per day. For a 480 GB model, that equals about 1.73 TB of writes daily across the defined warranty period.
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 sudden outages, reducing corruption risk and improving reliability in servers, databases, and RAID environments.
Q: What RAID level is recommended for this SSD?
A: The best RAID level depends on your priority. RAID 1 suits redundancy, RAID 10 is ideal for high-performance databases, and RAID 5 or 6 fits balanced capacity and protection needs.