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| Brand | Samsung |
|---|---|
| Model | PM1643a |
| Capacity | 7.68TB |
| 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 |
|---|---|
| Drive Writes Per Day | 1 |
| Total Bytes Written | 14016 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 | MZILT7T6HMLA |
|---|
Compared with the previous-generation MZILT7T6HMLA, the Samsung PM1643a (MZILT7T6HALAAD3) is the stronger 7.68TB SAS 12Gb/s refresh for enterprise arrays, combining up to 2100/1800 MB/s sequential performance with 450,000/70,000 IOPS to deliver higher practical headroom for mixed read/write workloads. Its distinctive value is pairing Samsung V-NAND 3bit MLC efficiency with 1 DWPD and 14,016 TBW, making it a precise fit for virtualized infrastructure, OLTP databases, and capacity-dense SAN tiers that need predictable endurance without moving to a higher-cost write-intensive SSD class.
With an endurance rating of 14,016 TBW, the MZILT7T6HALAAD3 is designed to handle very heavy write activity over its service life, making it far more than sufficient for typical OS, application, and mixed enterprise workloads. In practical terms, for common server boot or system-disk usage, this level of endurance supports many years of worry-free operation and provides strong margin even under sustained daily writes. For enterprise reliability, built-in Power Loss Protection (PLP) helps preserve in-flight data and protect metadata integrity if power is suddenly interrupted, reducing the risk of corruption during unexpected shutdowns. Its UBER rating of 1.0E-17 indicates an extremely low uncorrectable bit error rate, which is critical for business systems that require high data integrity, while the 2 million hour MTBF further reinforces confidence in long-term deployment.
1. The SAS 12Gb/s interface provides dual-port, enterprise-grade connectivity that improves high-availability storage design and enables predictable integration into mission-critical servers and storage arrays.
2. With sequential read performance of 2100 MB/s, this SSD accelerates large-block workloads such as backup restore, database scans, and analytics ingestion, reducing data access bottlenecks in shared storage environments.
3. Its random read capability of 450,000 K IOPS supports highly concurrent virtualized and transactional workloads, helping maintain fast response times even under heavy mixed-user demand.
4. Rated at 1 DWPD, the drive is well suited for read-centric enterprise deployments where consistent daily write endurance is needed without overpaying for heavier write-class media.
5. Built with Samsung V-NAND 3bit MLC and delivering a typical latency of 130 µs, it offers a strong balance of flash density, cost efficiency, and responsive service times for latency-sensitive business applications.
Lower capacity reference: 3.84TB Higher capacity reference: 15.36TB In this series, the 7.68TB model is the sweet spot for mainstream enterprise deployments. Compared with the 3.84TB version, it gives much more headroom for VM growth, database expansion, and longer refresh cycles without changing the familiar enterprise-class read/write and IOPS profile. Compared with the 15.36TB option, it delivers a better balance of cost, usable capacity, and performance consistency, making budgeting easier at scale. It is especially well suited for mid-sized virtualization clusters, such as hosting system and application storage for around 60-80 mixed-workload virtual machines.
Q: Is MZILT7T6HALAAD3 suitable for a write-heavy database server?
A: MZILT7T6HALAAD3 can support database workloads, but with 1 DWPD it is better suited for mixed-use rather than highly write-intensive database servers with sustained heavy daily overwrite activity.
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 sustain one full 7.68TB drive write per day across its warranty period, aligned with its 14,016TB TBW endurance rating.
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 reliability.
Q: What RAID level is recommended for this SSD?
A: The recommended RAID level depends on your priority. RAID 10 is preferred for high database performance and redundancy, while RAID 5 or RAID 6 may suit capacity-focused environments.