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| Brand | Samsung |
|---|---|
| Model | PM1645a |
| Capacity | 3.2 TB |
| Usage Class | Mixed Use |
| Host Interface | SAS 12Gb/s |
|---|---|
| Total Interface Bandwidth | 12 Gb/s |
| Form Factor | 2.5 |
|---|
| NAND Flash | TLC V-NAND |
|---|---|
| Drive Writes Per Day | 3 |
| Total Bytes Written | 17520 TBW |
| Sequential Read | 1000 MB/s |
|---|---|
| Sequential Write | 1000 MB/s |
| Random Read IOPS | 230000 |
| Random Write IOPS | 140000 |
| Average Latency | 45 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZ-ILT3T2A |
|---|
The Samsung PM1645a (MZ-ILT3T2B) is a strong choice for mission-critical SAS enterprise tiers, pairing 3.2TB of TLC V-NAND with 3 DWPD endurance, 17,520TBW, and balanced 1000/1000 MB/s throughput plus up to 230K/140K IOPS for mixed OLTP, virtualization, and database workloads. Compared with the previous-generation MZ-ILT3T2A, the MZ-ILT3T2B delivers a refreshed enterprise platform with the same 12Gb/s SAS compatibility while strengthening the value proposition through a 3.2TB capacity point and high sustained write endurance for denser, longer-life deployments.
With an endurance rating of 17,520 TBW and 3 DWPD, the MZ-ILT3T2B is built for sustained enterprise write workloads and can support writing the full drive capacity three times per day throughout its rated service life. In typical mixed or system-drive deployments, this level of endurance provides a very large safety margin, making it well suited for long-term, worry-free operation even under demanding daily use. For enterprise reliability, integrated power loss protection (PLP) helps preserve in-flight data and metadata during unexpected power interruptions, reducing the risk of corruption and improving operational stability. Its ultra-low UBER of 1.0E-17, together with a 2 million hour MTBF, reflects a high-integrity storage design that supports dependable data retention and consistent performance in business-critical environments.
1. The SAS 12Gb/s interface ensures seamless integration with dual-controller enterprise storage environments, improving availability and simplifying deployment in mission-critical servers.
2. Its strong sequential read performance accelerates large-block data access, making backups, analytics scans, and media retrieval workflows complete noticeably faster.
3. High random read capability enables the drive to sustain heavy transaction concurrency, which is especially valuable for virtualization, OLTP databases, and read-intensive cloud workloads.
4. A 3 DWPD endurance rating supports sustained daily overwrite activity over the service life of the drive, giving enterprises confidence in write-heavy applications and predictable maintenance planning.
5. TLC V-NAND paired with low typical latency delivers a balanced mix of cost efficiency, consistent responsiveness, and dependable QoS for latency-sensitive business platforms.
Lower capacity reference: 1.6 TB Higher capacity reference: 6.4 TB In this enterprise SSD family, the 3.2 TB model sits at the practical sweet spot. Compared with the 1.6 TB version, it gives much better capacity headroom for OS images, application data, logs, and growth buffers, reducing early drive exhaustion and refresh pressure. Compared with the 6.4 TB option, it usually delivers a more attractive cost profile while keeping essentially the same sequential and random performance envelope. That makes 3.2 TB a balanced choice for mid-scale virtualization clusters, such as hosting boot and application volumes for about 60 to 80 mixed-workload virtual machines.
Q: Is MZ-ILT3T2B suitable for a write-heavy database server?
A: Yes. With 3 DWPD endurance, 17,520 TBW, TLC V-NAND, and 45 µs typical latency, the MZ-ILT3T2B 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 a 3.2 TB SSD, that equals about 9.6 TB of writes daily across the supported warranty period.
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 metadata during unexpected power failures, reducing corruption risk and improving storage reliability.
Q: What RAID level is recommended for this SSD?
A: The recommended RAID level depends on your goal. RAID 10 is preferred for high-write database performance and redundancy, while RAID 5 or 6 may better balance capacity and protection.