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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 | MZ7KM1T9HMJP0D3 |
|---|
Compared with the previous-generation MZ7KM1T9HMJP0D3, the Samsung SM863a 1.92TB upgrades to 48-layer 3D MLC V-NAND and delivers a stronger enterprise endurance profile with 3.6 DWPD and 12,612 TBW, making it a more robust choice for write-intensive SATA deployments. With up to 510/485 MB/s sequential performance and 95,000/28,000 IOPS random throughput, MZ-7KM1T9B offers a well-balanced step forward in sustained mixed-workload performance and lifecycle value for read/write-heavy servers and storage arrays.
With an endurance rating of 12,612 TBW and 3.6 DWPD, the MZ-7KM1T9B is built for sustained enterprise write workloads and can handle full-drive writes multiple times per day over its service life. In typical system-boot, virtualization, or mixed read/write server use, this level of endurance means the drive can be deployed for many years with substantial margin, making it a very safe choice for long-term operation. For enterprise reliability, the drive includes power loss protection (PLP), which helps preserve in-flight data and metadata during unexpected power interruptions, reducing the risk of corruption and unplanned recovery events. Its UBER of 1.0E-17, together with a 2 million hour MTBF, reflects a very low probability of unrecoverable bit errors and strong overall dependability for business-critical environments.
1. The SATA enterprise interface provides broad server and storage-array compatibility, enabling straightforward upgrades in legacy infrastructure without disruptive platform changes.
2. Its near-bus-limit sequential read performance accelerates boot, backup restore, and large dataset access in read-centric enterprise workloads.
3. Strong random read capability helps databases, virtual desktops, and metadata-heavy applications respond faster under highly concurrent access patterns.
4. The high write-endurance profile supports sustained mixed-workload operation, making it well suited for write-intensive environments such as logging, caching, and transactional systems.
5. Samsung’s vertically stacked MLC NAND, paired with very low typical latency, delivers a balanced combination of predictable responsiveness, enterprise reliability, and consistent performance under sustained demand.
Lower capacity reference: 960 GB Higher capacity reference: 3.84 TB At 1.92 TB, the MZ-7KM1T9B sits in the sweet spot of its series. Compared with the 960 GB model, it gives substantially more headroom for OS images, application stacks, logs, and moderate data growth, reducing early capacity pressure. Compared with the 3.84 TB version, it typically delivers a better balance of acquisition cost, usable flash, and enterprise-grade performance consistency, since sequential throughput and random IOPS remain broadly similar across the family. It is best suited for mid-scale virtualization clusters, mixed database nodes, or consolidated boot and application storage for about 40–60 business servers.
Q: Is MZ-7KM1T9B suitable for a write-heavy database server?
A: Yes. With 3.6 DWPD, 12,612 TBW, Samsung 48-layer 3D MLC V-NAND, and 115 µs typical latency, the MZ-7KM1T9B is well suited for write-intensive database and transactional 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 1.92 TB SSD, that equals about 6.9 TB of writes daily, totaling roughly 12,612 TBW over five years.
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 storage reliability in enterprise and database environments.
Q: What RAID level is recommended for this SSD?
A: For most business-critical and write-heavy applications, RAID 10 is the preferred choice. It provides strong performance, faster rebuilds, and better fault tolerance than parity-based RAID for transactional workloads.