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| Brand | Samsung |
|---|---|
| Model | PM1643a |
| Capacity | 3.84TB |
| 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 | 7008 TBW |
| Sequential Read | 2100 MB/s |
|---|---|
| Sequential Write | 1800 MB/s |
| Random Read IOPS | 450000 |
| Random Write IOPS | 40000 |
| Average Latency | 130 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZILT3T8HALS |
|---|
Compared with the earlier MZILT3T8HALS, the PM1643a (MZILT3T8HBLSAD4) advances Samsung’s 3.84TB 12Gb/s SAS platform with a stronger read-centric performance envelope—up to 2,100/1,800 MB/s sequential throughput and 450,000/40,000 IOPS—while maintaining enterprise durability at 1 DWPD and 7,008 TBW. Its unique value is delivering that balance on Samsung V-NAND 3bit MLC, making it a highly targeted upgrade for database read tiers, virtualization clusters, and shared storage arrays that need higher usable SAS performance without stepping up to a more expensive high-endurance class.
With an endurance rating of 7008 TBW and 1 DWPD, the MZILT3T8HBLSAD4 is designed to handle a full-drive write every day across its rated service life, which is more than sufficient for typical enterprise OS, boot, logging, caching, and mixed read/write workloads. In practical terms, for common system-disk and general server applications, this level of endurance supports long-term operation with a strong margin, giving procurement teams confidence in stable use over many years under normal deployment conditions. This drive also includes power loss protection (PLP), which helps preserve in-flight data and metadata during an unexpected power interruption, reducing the risk of data corruption and improving operational resilience. Its UBER of 1.0E-17 indicates an enterprise-class unrecoverable bit error rate, meaning an extremely low probability of uncorrectable read errors, while the 2 million hour MTBF further supports dependable continuous operation in data center environments.
1. The dual-port SAS interface provides enterprise-grade path redundancy and stable shared-storage connectivity, making this drive a strong fit for mission-critical servers and HA arrays.
2. Its high sequential read bandwidth accelerates large-block workloads such as backup recovery, media streaming, and analytics dataset loading, reducing wait time for throughput-heavy applications.
3. The strong random read capability helps databases, virtualization clusters, and metadata-intensive platforms deliver faster response under highly concurrent small-block access.
4. With a write endurance profile suited to steady daily rewrites and Samsung V-NAND 3bit MLC media, it offers a balanced mix of longevity, cost efficiency, and dependable performance for mainstream enterprise workloads.
5. The low typical latency improves transaction consistency and application responsiveness, which is especially valuable for OLTP systems and latency-sensitive virtualized environments.
Lower capacity: 1.92TB Higher capacity: 7.68TB Capacity positioning analysis: At 3.84TB, this SSD sits in the sweet spot of the family. Compared with the 1.92TB model, it offers much better headroom for dataset growth, VM expansion, and longer refresh cycles without changing the expected enterprise read/write and IOPS profile. Compared with the 7.68TB model, it delivers a more efficient balance of usable capacity, acquisition cost, and rack-level storage planning. This makes 3.84TB especially well suited for mid-scale virtualization clusters, such as hosting boot and application volumes for about 40 to 60 business workloads.
Q: Is MZILT3T8HBLSAD4 suitable for a write-heavy database server?
A: It can support database workloads, but with a 1 DWPD endurance rating, it is better suited for mixed-use or moderate write-intensive environments rather than extremely write-heavy, high-churn database servers.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This model is rated for 1 full drive write per day over the warranty period. For a 3.84TB SSD, that aligns with its 7008TB total bytes written 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 sudden outages, which is critical for preventing corruption and maintaining consistency in enterprise systems.
Q: What RAID level is recommended for this SSD?
A: For database and transactional workloads, RAID 10 is typically recommended because it offers strong redundancy and better write performance. RAID 5 or 6 may fit more capacity-focused, read-heavy deployments.