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| Brand | Samsung |
|---|---|
| Model | PM1643 |
| Capacity | 7.68 TB |
| Usage Class | Read Intensive |
| Host Interface | SAS 12Gb/s |
|---|---|
| Total Interface Bandwidth | 12 Gb/s |
| Form Factor | 2.5 |
|---|
| NAND Flash | Samsung V-NAND 3bit MLC |
|---|---|
| Drive Writes Per Day | 1 |
| Total Bytes Written | 14016 TBW |
| Sequential Read | 2100 MB/s |
|---|---|
| Sequential Write | 1700 MB/s |
| Random Read IOPS | 400000 |
| Random Write IOPS | 40000 |
| Average Latency | 100 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZILT7T6HMLA-00007 |
|---|
Compared with the previous-generation MZILT7T6HMLA-00007, the Samsung PM1643 MPN MZ-1LT7T6A delivers a clear generational step forward with 7.68 TB of Samsung V-NAND 3-bit MLC, up to 2,100/1,700 MB/s sequential performance, and 400,000/40,000 IOPS on the same SAS 12Gb/s enterprise interface. With 1 DWPD endurance and 14,016 TBW, it is a strong fit for capacity-dense transactional databases, virtualization clusters, and business-critical mixed-read workloads that need higher throughput and better consolidation efficiency than earlier SAS SSD generations.
With an endurance rating of 14,016 TBW and 1 DWPD, the MZ-1LT7T6A is designed to support writing its full capacity once per day across its warranty period, which is more than sufficient for typical enterprise system-boot, read-intensive, and mixed-use deployments. In practical terms, this level of endurance provides a very large write budget for normal server workloads and allows procurement teams to deploy it with confidence for long-term, stable operation. For enterprise reliability, the drive includes Power Loss Protection (PLP), which helps preserve in-flight data and protects metadata integrity if power is interrupted unexpectedly. Its UBER of 1.0E-17 indicates an extremely low uncorrectable bit error rate, supporting high data integrity requirements, while the 2 million-hour MTBF further reflects a design aimed at dependable continuous service.
1. The SAS 12Gb/s interface ensures seamless integration with dual-controller enterprise storage and mission-critical servers, combining mature high-availability architecture with dependable throughput.
2. Sequential read performance of 2100 MB/s accelerates large-block data movement, reducing backup, restore, analytics scan, and virtualization image load times.
3. Random read performance of 400,000 K IOPS sustains fast response under highly concurrent database and VDI workloads, helping prevent storage from becoming the bottleneck.
4. A 1 DWPD endurance rating makes the drive well suited for read-intensive enterprise deployments where predictable lifespan and controlled replacement cycles matter.
5. Samsung V-NAND 3bit MLC paired with 100 µs typical latency delivers a strong balance of flash density, cost efficiency, and consistently quick access for latency-sensitive applications.
Lower capacity reference: 3.84 TB Higher capacity reference: 15.36 TB At 7.68 TB, MZ-1LT7T6A sits at the sweet spot of the family. Compared with the 3.84 TB option, it gives much better headroom for data growth, denser VM placement, and longer refresh cycles without changing the familiar enterprise-class sequential and random performance profile. Compared with 15.36 TB, it offers a more efficient balance of acquisition cost, usable capacity, and predictable performance per drive. This makes it especially well suited for mid-scale virtualization clusters, mixed database nodes, and read-heavy application servers in the 20 to 60 workload range.
Q: Is MZ-1LT7T6A suitable for a write-heavy database server?
A: MZ-1LT7T6A is better suited for mixed-use enterprise workloads rather than heavily write-intensive databases. With 1 DWPD, it can handle steady writes, but higher-endurance SSDs are preferred for very write-heavy deployments.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This model is rated at 1 DWPD, meaning it can sustain one full 7.68 TB drive write per day throughout its warranty period, consistent with its 14,016 TBW endurance specification.
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 for enterprise storage and transactional applications.
Q: What RAID level is recommended for this SSD?
A: RAID 10 is commonly recommended for this SSD in performance-sensitive enterprise environments, as it balances speed, redundancy, and rebuild efficiency. RAID 5 or 6 may suit capacity-focused, read-dominant workloads.