Samsung MZILT7T6HALA-00007 7.68TB PM1643a Series SAS 12Gb/s 2.5 15mm Enterprise Data Center / Read Intensive Solid State Drive

General

Brand	Samsung
Model	PM1643a Series
Capacity	7.68TB
Usage Class	Enterprise Data Center / Read Intensive

Interface

Host Interface	SAS 12Gb/s
Total Interface Bandwidth	12 Gb/s

Physical Dimension

Form Factor	2.5 15mm

Flash & Endurance

NAND Flash	Samsung V-NAND TLC
Drive Writes Per Day	1
Total Bytes Written	14016 TBW

Performance

Sequential Read	2100 MB/s
Sequential Write	2000 MB/s
Random Read IOPS	450000
Random Write IOPS	70000
Average Latency	120 μs

Reliability

Mean Time Between Failures	2.0 Million Hours
Uncorrectable Bit Error Rate	1.0×10⁻¹⁷
Power Loss Protection	Yes

Part Number

MPN	MZILT7T6HMLA

Engineer's Note

Compared with the earlier MZILT7T6HMLA, the MZILT7T6HALA refreshes Samsung’s 7.68TB PM1643a platform with a stronger performance-endurance balance, combining 2,100/2,000 MB/s sequential throughput, up to 450,000/70,000 IOPS, and 14,016 TBW in the same 12Gb/s SAS enterprise class. For SAS-based virtualization clusters, transactional databases, and mixed read/write storage tiers, it delivers more usable headroom than older enterprise SAS SSDs by pairing Samsung V-NAND TLC efficiency with 1 DWPD durability and high-density capacity without compromising predictable 24x7 performance.

Endurance & Reliability

With an endurance rating of 14,016 TBW and 1 DWPD, the MZILT7T6HALA-00007 is designed to handle writing its full usable capacity once per day throughout its rated service life, which is more than sufficient for typical enterprise system, boot, caching, and mixed-read workloads. In practical terms, under normal OS and application usage patterns, this level of endurance provides long-term write headroom and can support many years of stable operation without endurance-related concern. Its enterprise reliability profile is further strengthened by power loss protection (PLP), which helps preserve in-flight data and protects metadata integrity during unexpected power interruptions, reducing the risk of corruption and downtime. In addition, the ultra-low UBER of 1.0E-17 and 2 million hours MTBF indicate a highly dependable drive designed for data-center environments where data integrity, predictable performance, and operational continuity are critical.

Technical Specs & Insights

1. The SAS 12Gb/s interface, paired with strong sequential read throughput, enables fast bulk data movement for database backups, virtualization images, and analytics datasets without requiring a PCIe infrastructure refresh.
2. Its high random-read capability helps latency-sensitive enterprise workloads such as OLTP databases, VDI boot storms, and metadata-heavy applications respond quickly under heavy concurrency.
3. A 1 DWPD endurance rating makes it a solid fit for read-centric and mixed-use data center deployments that need predictable lifespan across continuous daily operation.
4. Samsung V-NAND TLC provides an effective balance of capacity, power efficiency, and cost, making it well suited for scaling enterprise storage while maintaining dependable performance consistency.
5. The low typical latency supports faster transaction acknowledgment and more stable application response times, which is especially valuable in clustered servers and real-time business systems.

Capacity Sweet

Lower capacity reference: 3.84TB Higher capacity reference: 15.36TB The 7.68TB model sits at the sweet spot of the series. Compared with the 3.84TB version, it gives much more headroom for data growth, denser server utilization, and longer refresh cycles without changing the familiar enterprise performance profile. Compared with the 15.36TB option, it delivers a better balance of acquisition cost, usable capacity, and predictable performance per dollar. In practice, it is an excellent fit for mid-scale virtualization clusters, mixed database workloads, or a 2U application server pool supporting about 40 to 60 business-critical virtual machines.

FAQ