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| Brand | Samsung |
|---|---|
| Model | PM1645a |
| Capacity | 800GB |
| Usage Class | Mixed Use / Enterprise |
| Host Interface | SAS 12.0 Gb/s |
|---|---|
| Total Interface Bandwidth | 12 Gb/s |
| Form Factor | 2.5 |
|---|
| NAND Flash | Samsung V-NAND (96-layer) TLC |
|---|---|
| Drive Writes Per Day | 3 |
| Total Bytes Written | 4380 TBW |
| Sequential Read | 2100 MB/s |
|---|---|
| Sequential Write | 1600 MB/s |
| Random Read IOPS | 400000 |
| Random Write IOPS | 110000 |
| Average Latency | 130 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZILT800HAHQ |
|---|
Compared with the previous-generation MZILT800HAHQ, the Samsung PM1645a (MZ-ILT800B) moves to 96-layer V-NAND and delivers a stronger blend of sustained performance and write endurance, with up to 2,100/1,600 MB/s sequential throughput, 400K/110K IOPS, and 3 DWPD rated for 4,380 TBW. For 12 Gb/s SAS enterprise arrays, the 800GB PM1645a is a particularly strong fit for latency-sensitive OLTP, virtualization, and mixed read/write database tiers that need higher I/O density without sacrificing endurance.
With an endurance rating of 4,380 TBW and 3 DWPD, the MZ-ILT800B is built for sustained write-intensive use far beyond typical client or boot-drive workloads. In practical terms, for common system-disk and mixed enterprise applications, this level of endurance provides long-term headroom and can comfortably support many years of stable operation under normal deployment conditions. The MZ-ILT800B also includes power loss protection (PLP), which helps preserve in-flight data and mapping information during an unexpected power interruption, reducing the risk of corruption and downtime. Its enterprise-class UBER of 1.0E-17, together with a 2 million hour MTBF, indicates a very low probability of uncorrectable errors and strong overall reliability for business-critical environments.
1. The SAS 12.0 Gb/s interface ensures drop-in compatibility with dual-port enterprise storage backplanes, enabling highly available deployments and simpler integration into existing server and SAN environments.
2. With 2100 MB/s sequential read performance, the drive accelerates large-block workloads such as backup recovery, media streaming, and data warehouse scans, reducing time-to-access for bulk datasets.
3. Delivering 400,000 K IOPS random reads with 130 µs typical latency, it helps databases, virtualized workloads, and OLTP applications respond faster under heavy concurrent access.
4. A 3 DWPD endurance rating makes the SSD well suited for write-intensive enterprise use cases, supporting sustained logging, caching, and transactional workloads with predictable service life.
5. Samsung V-NAND (96-layer) TLC provides a strong balance of density, power efficiency, and reliability, giving enterprises cost-effective flash capacity without sacrificing data-center-class performance consistency.
Lower capacity reference: 400GB Higher capacity reference: 1.6TB In this product family, the 800GB MZ-ILT800B sits at a practical sweet spot. Compared with the 400GB option, it provides much better headroom for OS images, logs, metadata, and moderate application growth, reducing early capacity pressure. Compared with the 1.6TB model, it delivers a more efficient balance of acquisition cost, usable capacity, and essentially similar enterprise-class performance. This makes 800GB especially suitable for mid-scale virtualization clusters, mixed database instances, or as a shared boot and application tier for about 40 to 60 business workloads.
Q: Is MZ-ILT800B suitable for a write-heavy database server?
A: Yes. With 3 DWPD endurance, 4380 TBW, 12 Gb/s SAS, and 130 µs typical latency, the MZ-ILT800B 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: It is rated for 3 full drive writes per day. For an 800GB SSD, that equals about 2.4TB of writes daily throughout the warranty period, within its endurance specification.
Q: Does it include power loss protection (PLP) and why is that critical?
A: Yes, it includes PLP. This is critical because it helps protect in-flight data and mapping tables during sudden power failure, reducing corruption risk and improving enterprise data integrity.
Q: What RAID level is recommended for this SSD?
A: The recommended RAID level depends on workload. RAID 10 is typically best for write-heavy databases, while RAID 5 or RAID 6 may suit capacity-focused environments with balanced performance needs.