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| Brand | Samsung |
|---|---|
| Model | PM1643a |
| Capacity | 15.36 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 3D TLC |
|---|---|
| Drive Writes Per Day | 1 |
| Total Bytes Written | 28032 TBW |
| Sequential Read | 2100 MB/s |
|---|---|
| Sequential Write | 1800 MB/s |
| Random Read IOPS | 410000 |
| Random Write IOPS | 70000 |
| Average Latency | 115 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZILT15THMLA-00007 |
|---|
Samsung PM1643a (MPN MZILT15THALA-00007) is a 15.36 TB 12Gb/s SAS SSD that stands out for pairing enterprise-grade 1 DWPD endurance and 28,032 TBW with strong steady-state performance of 2,100/1,800 MB/s and 410K/70K IOPS, making it a strong fit for high-density transactional databases and virtualization clusters. Compared with the previous-generation MZILT15THMLA-00007, this model represents a generational platform update built on Samsung V-NAND 3D TLC, delivering a more compelling balance of capacity, SAS compatibility, and sustained mixed-workload performance in the same enterprise deployment class.
With an endurance rating of 28,032 TBW and 1 DWPD, this SSD is built to handle very heavy write activity, including writing the full drive capacity every day across its rated endurance life. In typical real-world workloads such as OS boot, application hosting, logging, and general enterprise read-heavy use, actual daily writes are usually far lower, so procurement teams can expect a large durability margin and long, worry-free service. Its power-loss protection (PLP) helps preserve in-flight data and metadata during an unexpected power interruption, reducing the risk of corruption and improving operational resilience. The enterprise-class UBER of 1.0E-17, together with a 2 million hour MTBF, indicates an extremely low probability of unrecoverable bit errors and supports dependable use in business-critical storage environments.
1. The SAS 12Gb/s interface, paired with strong sequential read performance, enables fast bulk data movement for enterprise storage arrays, reducing backup windows and speeding up analytics jobs.
2. With 2100 MB/s sequential reads, this SSD accelerates large-file access in database snapshots, virtual machine boot storms, and content streaming workloads.
3. Delivering 410,000 K IOPS in random reads, it supports highly responsive transaction processing and dense virtualization environments where low-queue-depth access speed directly impacts user experience.
4. A 1 DWPD endurance rating makes it well suited for read-intensive enterprise deployments that need predictable lifespan and controlled operating costs over the drive’s service life.
5. Built on Samsung V-NAND 3D TLC and featuring 115 µs typical latency, it balances flash density, reliability, and fast response time for consistent application performance in mixed business workloads.
Lower capacity reference: 7.68 TB Higher capacity reference: 30.72 TB Capacity positioning analysis: Within this enterprise SSD family, 15.36 TB is the practical sweet spot. Compared with 7.68 TB, it gives much better headroom for data growth, denser server consolidation, and longer refresh cycles without materially changing the familiar enterprise-class sequential throughput or random IOPS profile. Compared with 30.72 TB, it typically delivers a more balanced acquisition cost, easier capacity planning, and lower overprovisioning risk while still offering strong usable density. It is well suited for mid-scale virtualization clusters, such as shared storage for roughly 60 to 90 mixed-production virtual machines.
Q: Is MZILT15THALA-00007 suitable for a write-heavy database server?
A: It can support mixed or moderate write database workloads, but for truly write-heavy servers, 1 DWPD may be limiting. We normally recommend higher-endurance enterprise SSDs for sustained intensive writes.
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 handle one full 15.36 TB drive write per day over its warranty period, with a total endurance rating of 28,032 TBW.
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 sudden outages, which is critical for preventing corruption and maintaining enterprise storage reliability.
Q: What RAID level is recommended for this SSD?
A: RAID 10 is commonly recommended for performance-sensitive databases, while RAID 5 or RAID 6 may suit capacity-focused deployments. The best choice depends on your required balance of speed, redundancy, and usable capacity.