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| Brand | Samsung |
|---|---|
| Model | PM1645 |
| Capacity | 800 GB |
| Usage Class | Mixed Use |
| Host Interface | SAS 12.0 Gbps |
|---|---|
| Total Interface Bandwidth | 12 Gb/s |
| Form Factor | 2.5" |
|---|
| NAND Flash | Samsung V-NAND 3D TLC |
|---|---|
| Drive Writes Per Day | 3 |
| Total Bytes Written | 4380 TBW |
| Sequential Read | 2100 MB/s |
|---|---|
| Sequential Write | 2000 MB/s |
| Random Read IOPS | 400000 |
| Random Write IOPS | 65000 |
| Average Latency | 115 μs |
| Mean Time Between Failures | 2.5 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZ-7LM1T90 |
|---|
Compared with the older MZ-7LM1T90, the PM1645 (MZILT800HAHQ-000D3) upgrades to a 12.0 Gbps SAS enterprise platform and delivers up to 2100/2000 MB/s with 400,000/65,000 IOPS, giving storage arrays a clear generational lift in bandwidth and transactional responsiveness. Its standout value is the combination of 800 GB capacity, Samsung V-NAND 3D TLC, and 3 DWPD endurance (4,380 TBW), making it a highly dependable choice for virtualization clusters, OLTP databases, and other mixed-workload environments that need both sustained write durability and low-latency performance.
With an endurance rating of 4,380 TBW and 3 DWPD, the MZILT800HAHQ-000D3 is built to handle very write-intensive enterprise workloads over its service life. In practical terms, for typical OS, boot, logging, caching, or general server system-disk usage, this level of endurance provides a very large safety margin and can support many years of stable operation without endurance becoming a concern. For enterprise reliability, this SSD includes power loss protection (PLP), which helps preserve in-flight data and protects metadata integrity if power is suddenly interrupted. Its ultra-low UBER of 1.0E-17, together with a 2.5 million-hour MTBF, indicates very strong data integrity and long-term operational dependability expected in data center environments.
1. The SAS interface provides proven dual-port enterprise connectivity, enabling high availability and non-disruptive failover in mission-critical storage arrays.
2. Its strong sequential read performance accelerates large-block workloads such as data warehousing, backup restore, and media streaming, reducing time-to-data for throughput-heavy applications.
3. High random read capability paired with low typical latency keeps transaction databases, virtual desktop environments, and metadata-intensive services responsive even under heavy parallel access.
4. This endurance class is built for sustained mixed-workload operation, giving enterprises the confidence to run write-active applications like OLTP, virtualization, and logging throughout the drive’s service life.
5. Samsung V-NAND 3D TLC delivers a well-balanced mix of capacity, power efficiency, and performance consistency, making it a practical fit for mainstream enterprise deployments at scale.
Reference capacities in the same series: Lower capacity: 400 GB Higher capacity: 1.6 TB Capacity positioning analysis: In this series, the 800 GB model sits in a practical sweet spot. Compared with the 400 GB version, it gives meaningfully more headroom for OS images, application binaries, logs, and short-term data growth, reducing early capacity pressure. Compared with the 1.6 TB option, it keeps acquisition cost and replacement budget more controlled while delivering essentially the same enterprise-class sequential and random performance profile. This makes 800 GB especially suitable for mid-sized virtualization clusters, such as hosting boot and utility volumes for about 40 to 60 virtual machines.
Q: Is MZILT800HAHQ-000D3 suitable for a write-heavy database server?
A: Yes. With 3 DWPD endurance, 4380 TBW, SAS 12.0 Gbps, and 115 µs typical latency, the MZILT800HAHQ-000D3 is well suited for write-intensive database and enterprise transaction workloads.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This model is rated for 3 DWPD, meaning it can sustain three full 800 GB drive writes per day throughout its warranty term, consistent with its 4380 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 power failures, reducing corruption risk and maintaining storage integrity in enterprise environments.
Q: What RAID level is recommended for this SSD?
A: RAID choice depends on workload and redundancy goals. For database servers, RAID 10 is commonly recommended because it balances strong performance, low latency, and fault tolerance better than parity-based RAID.