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| Brand | Samsung |
|---|---|
| Model | PM1643a |
| 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 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 | MZILT960HAHQ-00007 |
|---|
Compared with the previous-generation MZILT960HAHQ-00007, the Samsung PM1643a (MZILT960HBHQAD3) brings a newer V-NAND 3D TLC platform that delivers up to 2100 MB/s read, 1000 MB/s write, and 380,000/40,000 IOPS, making it a stronger fit for SAS 12Gb/s arrays that need faster read latency and better mixed-workload responsiveness. With 1 DWPD and 1752 TBW at 960 GB, this drive is a solid recommendation for enterprise virtualization, database, and read-intensive transactional workloads where you want a balanced upgrade in performance density and endurance without changing the existing SAS infrastructure.
With an endurance rating of 1,752 TBW and 1 DWPD, the MZILT960HBHQAD3 is designed to handle writing its full 960GB capacity once per day throughout its rated service life, which is more than sufficient for typical enterprise boot, OS, and mainstream application workloads. In practical terms, for lighter-duty scenarios such as use as a system disk or general server storage, this level of endurance supports many years of stable operation with substantial write headroom. This drive also includes power loss protection (PLP), which helps preserve in-flight data and metadata during unexpected power interruptions, reducing the risk of corruption and improving operational resilience. Its enterprise-class UBER of 1.0E-17, together with a 2 million hour MTBF, indicates an extremely low probability of uncorrectable bit errors and strong overall reliability for business-critical environments.
1. The SAS enterprise interface ensures broad compatibility with dual-controller storage arrays and mission-critical servers, enabling reliable, high-availability deployment in existing datacenter infrastructures.
2. Its strong sequential read performance accelerates large-block workloads such as backup restore, media streaming, and data warehouse scans, reducing time-to-data for throughput-heavy applications.
3. The high random read capability is well suited for virtualization, OLTP databases, and metadata-intensive environments where fast access to small files directly improves user responsiveness and VM density.
4. With a write endurance profile designed for one full drive rewrite per day, it provides a balanced fit for mixed-use enterprise workloads that need predictable lifespan without overpaying for ultra-write-intensive media.
5. Built on Samsung V-NAND 3D TLC and backed by low typical latency, the drive combines mature flash efficiency with consistently quick response times for latency-sensitive business applications.
Lower-capacity reference: 480 GB Higher-capacity reference: 1.92 TB At 960 GB, this SSD sits in the sweet spot of the family. Compared with the 480 GB model, it gives meaningfully more headroom for OS images, logs, patches, and data growth, reducing early capacity pressure in always-on environments. Compared with the 1.92 TB option, it typically delivers the best balance between acquisition cost and enterprise-class performance consistency, without overprovisioning capacity that may go unused. It is well suited for mid-sized virtualization clusters, such as boot and infrastructure storage for roughly 40 to 60 virtual machines.
Q: Is MZILT960HBHQAD3 suitable for a write-heavy database server?
A: It can support moderate write-intensive database workloads, but for truly write-heavy environments, 1 DWPD may be limiting. It is better suited for mixed-use enterprise applications requiring SAS reliability and low latency.
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 960GB drive write per day over its warranty period, with a total endurance rating of 1752TBW.
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 sudden power failures, reducing the risk of corruption and maintaining system integrity.
Q: What RAID level is recommended for this SSD?
A: RAID 10 is generally recommended for this SSD in performance-sensitive enterprise environments, especially databases. It provides strong read/write performance, redundancy, and faster rebuild times than parity-based RAID levels.