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| Brand | Samsung |
|---|---|
| Model | PM1643A |
| Capacity | 3.84 TB |
| Usage Class | Read Intensive |
| Host Interface | SAS 12.0 Gbps |
|---|---|
| Total Interface Bandwidth | 12 Gb/s |
| Form Factor | 2.5" |
|---|
| NAND Flash | Samsung V-NAND 5th-Gen 92-layer 3D TLC |
|---|---|
| Drive Writes Per Day | 1 |
| Total Bytes Written | 7008 TBW |
| Sequential Read | 2100 MB/s |
|---|---|
| Sequential Write | 1400 MB/s |
| Random Read IOPS | 400000 |
| Random Write IOPS | 45000 |
| Average Latency | 135 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZILT3T8HALS |
|---|
The Samsung PM1643A (MZ-ILT3T8B) 3.84TB SAS SSD stands out for enterprise read-centric and mixed virtualization workloads by pairing 12.0 Gbps SAS with up to 2100/1400 MB/s and 400K/45K IOPS, while its 5th-Gen 92-layer V-NAND and 7008 TBW provide a strong balance of density, endurance, and predictable latency. Compared with the previous MZILT3T8HALS generation, the PM1643A delivers a clear generational uplift through newer 92-layer TLC V-NAND, enabling higher effective density and improved platform efficiency for data center deployments without sacrificing 1 DWPD-class reliability.
With an endurance rating of 7008 TBW and 1 DWPD, the MZ-ILT3T8B is designed to support writing its full 3.84 TB capacity every day for five years, which is far beyond the needs of a typical OS, boot, or general application drive. In practical terms, under normal enterprise system-disk workloads, procurement teams can expect long service life with substantial write headroom and no endurance concern for many years of operation. Its enterprise reliability features further reduce operational risk: Power Loss Protection (PLP) helps preserve in-flight data and protects metadata integrity if power is suddenly interrupted. An UBER of 1.0E-17 indicates an extremely low probability of uncorrectable bit errors, and together with the 2 million-hour MTBF, it reflects a drive built for stable, dependable data center use.
1. The dual-port SAS interface enables high-availability storage designs, allowing mission-critical servers to maintain data access during path failover and controller maintenance.
2. Its strong sequential read capability accelerates backup restores, analytics scans, and large dataset streaming, helping enterprise workloads move data with less waiting.
3. The drive’s high random-read performance, paired with low response latency, keeps virtualized databases and transactional applications consistently responsive under heavy concurrency.
4. The endurance profile is well suited to read-centric enterprise deployments, giving IT teams predictable lifespan and easier replacement planning in always-on environments.
5. Samsung’s advanced V-NAND TLC architecture balances density, power efficiency, and reliability, making it a practical choice for scaling business storage without sacrificing enterprise-grade consistency.
Lower capacity reference: 1.92 TB Higher capacity reference: 7.68 TB At 3.84 TB, the MZ-ILT3T8B sits in the sweet spot of the series. Compared with the 1.92 TB model, it gives much better headroom for data growth, longer refresh cycles, and more flexible workload placement without changing the expected enterprise read/write and random IOPS profile. Compared with the 7.68 TB version, it delivers a more efficient balance between acquisition cost, usable capacity, and steady performance. This makes it especially well suited for mid-scale virtualization clusters, such as shared storage for roughly 40 to 60 mixed business application virtual machines.
Q: Is MZ-ILT3T8B suitable for a write-heavy database server?
A: It can support mixed-use database workloads, but for truly write-heavy servers, 1 DWPD may be limiting. It is better suited to balanced transactional environments needing low latency, SAS reliability, and PLP.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: Based on 7008 TBW and 3.84 TB capacity, the drive supports about one full drive write per day over a typical five-year warranty, which aligns directly with its 1 DWPD rating.
Q: Does it include power loss protection (PLP) and why is that critical?
A: Yes, MZ-ILT3T8B includes power loss protection. PLP helps preserve in-flight data and metadata during unexpected outages, reducing corruption risk and improving storage integrity in enterprise servers and RAID environments.
Q: What RAID level is recommended for this SSD?
A: For business-critical databases or virtualization, RAID 10 is typically recommended because it delivers strong performance, redundancy, and fast rebuilds. RAID 5 or 6 may suit more capacity-focused, read-dominant workloads.