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| Brand | Samsung |
|---|---|
| Model | SM863a |
| Capacity | 1.92 TB |
| Usage Class | Mixed Use |
| Host Interface | SATA 6.0 Gbps |
|---|---|
| Total Interface Bandwidth | 6 Gb/s |
| Form Factor | 2.5" |
|---|
| NAND Flash | Samsung V-NAND 48-layer 3D MLC |
|---|---|
| Drive Writes Per Day | 3.6 |
| Total Bytes Written | 12612 TBW |
| Sequential Read | 510 MB/s |
|---|---|
| Sequential Write | 485 MB/s |
| Random Read IOPS | 95000 |
| Random Write IOPS | 28000 |
| Average Latency | 115 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZ-WLJ1T90 |
|---|
The Samsung SM863a 1.92TB (MZ7KM1T9HMJP-000D3) stands out as a write-intensive SATA SSD that combines 3.6 DWPD, 12,612 TBW, and Samsung 48-layer 3D MLC V-NAND to deliver sustained enterprise endurance with up to 510/485 MB/s and 95K/28K IOPS. Compared with the previous MZ-WLJ1T90 generation, it brings a newer V-NAND architecture and a stronger endurance/performance profile, making it a better fit for mixed-read/write virtualization, OLTP, and cache-heavy server workloads where SATA consistency still matters.
With an endurance rating of 12,612 TBW and 3.6 DWPD, the MZ7KM1T9HMJP-000D3 is built for sustained enterprise write workloads far beyond typical OS, application, and general server usage. In practical terms, for system-boot or mixed read/write deployments, this level of endurance provides long-term confidence and can comfortably support many years of operation under normal data center conditions. For enterprise reliability, built-in Power Loss Protection (PLP) helps preserve in-flight data and metadata during an unexpected power interruption, reducing the risk of corruption and unplanned recovery events. Its UBER of 1.0E-17 indicates an extremely low uncorrectable bit error rate, which is critical for maintaining data integrity in business-critical storage environments.
1. The SATA 6.0 Gbps interface, paired with 510 MB/s sequential read speed, gives legacy enterprise platforms a cost-efficient upgrade path for faster boot, backup, and large-file streaming without changing server backplanes.
2. With 95,000 K IOPS random read performance, this SSD can sustain responsive access to highly fragmented data, making it well suited for virtualization, OLTP databases, and read-heavy cloud workloads.
3. A 3.6 DWPD endurance rating enables consistent operation under intensive daily overwrite cycles, helping enterprises deploy it confidently in write-active transactional and caching environments.
4. Samsung V-NAND 48-layer 3D MLC improves flash efficiency and reliability, delivering a stronger balance of endurance, power stability, and predictable long-term performance than consumer-grade NAND.
5. The 115 µs typical latency helps reduce storage response time at the microsecond level, supporting faster application transactions and more consistent QoS in latency-sensitive enterprise systems.
Lower capacity reference: 960 GB Higher capacity reference: 3.84 TB In this series, 1.92 TB is the practical sweet spot. Compared with the 960 GB model, it gives much better headroom for OS images, application growth, logs, and overprovisioning, reducing the risk of early capacity pressure. Compared with the 3.84 TB option, it keeps acquisition cost and fleet-level budget under tighter control while delivering essentially the same enterprise-class sequential and random performance profile. It is especially well suited for mid-scale virtualization clusters, such as hosting boot and utility volumes for about 40 to 60 general-purpose virtual machines.
Q: Is MZ7KM1T9HMJP-000D3 suitable for a write-heavy database server?
A: Yes. With 3.6 DWPD, 12,612 TBW endurance, Samsung 48-layer 3D MLC V-NAND, and low 115 µs typical latency, this SSD is well suited for write-intensive database workloads.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This model is rated for 3.6 full drive writes per day. For a 1.92 TB capacity, that equals about 6.9 TB of writes daily across its 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 unexpected outages, reducing corruption risk and improving reliability in enterprise and transactional environments.
Q: What RAID level is recommended for this SSD?
A: The best RAID level depends on your workload. RAID 10 is generally recommended for databases needing high performance and redundancy, while RAID 1 or RAID 5 may suit other priorities.