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| Brand | Samsung |
|---|---|
| Model | PM1643 |
| Capacity | 960 GB |
| Usage Class | Read Intensive |
| Host Interface | SAS 12Gb/s |
|---|---|
| Total Interface Bandwidth | 12 Gb/s |
| Form Factor | 2.5 |
|---|
| NAND Flash | Samsung V-NAND 64-layer 3D TLC |
|---|---|
| Drive Writes Per Day | 1 |
| Total Bytes Written | 1752 TBW |
| Sequential Read | 2100 MB/s |
|---|---|
| Sequential Write | 1000 MB/s |
| Random Read IOPS | 380000 |
| Random Write IOPS | 40000 |
| Average Latency | 100 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZILS960HEHP |
|---|
Compared with the previous-generation MZILS960HEHP, the Samsung PM1643 (MZILT960HAHQAD3) moves to 64-layer 3D TLC V-NAND and delivers up to 2100/1000 MB/s sequential performance with 380,000/40,000 IOPS, giving SAS environments a clear uplift in read throughput, flash density, and platform efficiency in the same 960 GB class. For enterprise servers and storage arrays running read-centric databases, virtualization, and mixed OLTP workloads, it stands out by combining 12Gb/s SAS reliability with 1 DWPD endurance and 1752 TBW, making it a stronger cost/performance successor for steady-state datacenter deployment.
With an endurance rating of 1,752 TBW and 1 DWPD, the MZILT960HAHQAD3 is designed to handle writing its full 960 GB capacity once per day throughout its rated service life, which is more than sufficient for typical server boot, OS, logging, and mainstream application workloads. In practical terms, under common system-disk or read-heavy enterprise use, this level of endurance provides long-term peace of mind and can comfortably support many years of stable operation without endurance-related concern. For enterprise reliability, built-in Power Loss Protection (PLP) helps preserve in-flight data and metadata during unexpected power interruptions, reducing the risk of corruption and improving system recovery confidence. Its UBER of 1.0E-17 indicates an extremely low unrecoverable bit error rate, supporting high data integrity expectations in business-critical environments, while the 2 million hour MTBF further reflects a design focused on dependable continuous use.
1. The SAS 12Gb/s interface, paired with strong sequential read bandwidth, accelerates large-block data movement for backup targets, media repositories, and scale-out storage nodes while preserving the dual-port reliability enterprises expect.
2. Its 2100 MB/s sequential read performance shortens bulk ingest, restore, and analytics scan windows, helping data-intensive applications reach useful data faster.
3. Delivering 380,000 K IOPS in random reads, the drive sustains responsive performance for highly concurrent virtualization, database, and metadata-heavy workloads under mixed demand.
4. With a 1 DWPD endurance rating, it is well suited for read-centric enterprise deployments that need predictable service life, controlled replacement cycles, and lower storage TCO.
5. Built on Samsung V-NAND 64-layer 3D TLC and backed by a typical latency of 100 µs, the drive combines density and cost efficiency with consistently fast response times for business-critical systems.
Lower capacity reference: 480 GB Higher capacity reference: 1.92 TB At 960 GB, this model sits in the sweet spot of the series for mainstream enterprise deployments. Compared with the 480 GB version, it offers much better headroom for OS images, application growth, logs, and overprovisioning, reducing the risk of early capacity pressure. Compared with the 1.92 TB option, it delivers nearly the same enterprise-class sequential and random performance while keeping acquisition cost and fleet-level budget under tighter control. It is especially well suited for mid-sized virtualization clusters, such as hosting boot and utility volumes for about 40 to 60 virtual machines.
Q: Is MZILT960HAHQAD3 suitable for a write-heavy database server?
A: MZILT960HAHQAD3 can support mixed-use database workloads, but with 1 DWPD it is not ideal for highly write-intensive servers. It fits better in read-heavy or moderate-write enterprise database environments.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This SSD is rated for 1 DWPD, meaning it can handle one full 960GB drive write per day over its warranty period. Its 1752TBW rating confirms solid enterprise-level endurance.
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 protects mapping tables during sudden outages, which is critical for preventing corruption and maintaining storage integrity.
Q: What RAID level is recommended for this SSD?
A: The recommended RAID level depends on workload needs. RAID 10 is preferred for high database performance and redundancy, while RAID 5 or 6 may suit capacity-focused applications better.