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| Brand | Samsung |
|---|---|
| Model | PM1643a |
| Capacity | 15.36TB |
| Usage Class | Enterprise |
| Host Interface | SAS 12Gb/s |
|---|---|
| Total Interface Bandwidth | 12 Gb/s |
| Form Factor | 2.5 |
|---|
| NAND Flash | Samsung V-NAND 3bit MLC (TLC) |
|---|---|
| Drive Writes Per Day | 1 |
| Total Bytes Written | 28032 TBW |
| Sequential Read | 2100 MB/s |
|---|---|
| Sequential Write | 1800 MB/s |
| Random Read IOPS | 450000 |
| Random Write IOPS | 70000 |
| Average Latency | 130 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZILT15THMLA |
|---|
Compared with the earlier MZILT15THMLA, the PM1643a MZILT15THALA-00AC9 brings a newer-generation 15.36TB SAS 12Gb/s platform with stronger throughput density, delivering up to 2100/1800 MB/s and 450,000/70,000 IOPS while maintaining 1 DWPD and 28,032 TBW endurance. Its standout value is pairing very high usable capacity with enterprise SAS reliability, making it a stronger fit than the previous generation for storage consolidation, virtualization clusters, and read-centric database tiers where rack efficiency and predictable endurance matter most.
With an endurance rating of 28,032 TBW and 1 DWPD, this SSD is designed to support writing its full usable capacity once every day across a standard enterprise service life, which is more than sufficient for typical server, boot, and mixed-application workloads. In practical terms, when used as a system disk or in read-heavy to balanced enterprise environments, it provides long-term write headroom that allows procurement teams to deploy it with confidence for many years of stable operation. Its built-in power loss protection (PLP) helps preserve in-flight data and protects mapping tables during unexpected power interruptions, significantly reducing the risk of corruption or incomplete writes. An UBER of 1.0E-17 means the drive delivers enterprise-class read reliability, with an extremely low probability of uncorrectable bit errors, helping ensure strong data integrity in business-critical systems.
1. The SAS interface ensures seamless integration with dual-controller enterprise storage platforms, while its strong sequential bandwidth accelerates backup, media streaming, and large-scale data migration workloads.
2. Its high random read capability enables fast response under heavily concurrent database, virtualization, and analytics environments where small-block access dominates.
3. The endurance rating supports one full drive overwrite per day throughout the warranty period, making it a solid fit for mixed-use enterprise applications with steady daily write activity.
4. Samsung V-NAND TLC balances cost efficiency, capacity density, and reliability, helping data centers scale flash storage economically without sacrificing enterprise-grade stability.
5. The low typical latency helps reduce application wait time, improving transaction consistency and user responsiveness in latency-sensitive server workloads.
Lower capacity reference: 7.68TB Higher capacity reference: 30.72TB Capacity positioning analysis: In this family, 15.36TB sits at the sweet spot between the 7.68TB and 30.72TB options. Compared with 7.68TB, it gives substantially more headroom for data growth, denser consolidation, and longer refresh cycles without changing the familiar enterprise performance profile. Compared with 30.72TB, it usually delivers a better balance of acquisition cost, usable capacity, and risk concentration per drive while keeping similar read/write and IOPS behavior. It is especially well suited for mid-scale virtualization clusters, mixed database pools, and high-density all-flash SAN tiers.
Q: Is MZILT15THALA-00AC9 suitable for a write-heavy database server?
A: It can support mixed or moderate write database workloads, but it is not ideal for highly write-intensive servers. With 1 DWPD and TLC V-NAND, it is better suited for balanced enterprise applications.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This model is rated for 1 DWPD, meaning it can handle one full drive write per day during its warranty period. For 15.36TB capacity, that equals about 15.36TB written daily.
Q: Does it include power loss protection (PLP) and why is that critical?
A: Yes, it includes power loss protection. PLP is critical because it helps preserve in-flight data and metadata during unexpected power failure, reducing corruption risk and improving enterprise data integrity.
Q: What RAID level is recommended for this SSD?
A: For most enterprise deployments, RAID 10 is recommended when both performance and redundancy matter. If capacity efficiency is more important, RAID 5 or RAID 6 may also be considered.