Samsung MZILS960HEHP0D4 960 GB PM1633a SAS 12.0 Gbps 2.5" Read Intensive Solid State Drive

General

Brand	Samsung
Model	PM1633a
Capacity	960 GB
Usage Class	Read Intensive

Interface

Host Interface	SAS 12.0 Gbps
Total Interface Bandwidth	12 Gb/s

Physical Dimension

Form Factor	2.5"

Flash & Endurance

NAND Flash	Samsung V-NAND 48-layer 3D TLC
Drive Writes Per Day	1
Total Bytes Written	1752 TBW

Performance

Sequential Read	1300 MB/s
Sequential Write	1100 MB/s
Random Read IOPS	200000
Random Write IOPS	32000
Average Latency	100 μs

Reliability

Mean Time Between Failures	2 Million Hours
Uncorrectable Bit Error Rate	1.0×10⁻¹⁷
Power Loss Protection	Yes

Part Number

MPN	MZ-ILS1T6N

Engineer's Note

Compared with the previous-generation MZ-ILS1T6N, the Samsung PM1633a MZILS960HEHP0D4 moves to 48-layer V-NAND and delivers a stronger balance of 1,300/1,100 MB/s throughput, up to 200,000/32,000 IOPS, and 1,752 TBW endurance in a 960 GB SAS 12 Gb/s form factor. That makes it a particularly strong choice for read-heavy to mixed enterprise workloads such as virtualized infrastructure, scale-out databases, and business-critical server boot/storage tiers where low-latency SAS performance and predictable 1 DWPD durability are more valuable than raw write-intensive overprovisioning.

Endurance & Reliability

With an endurance rating of 1,752 TBW and 1 DWPD, the MZILS960HEHP0D4 is designed to handle writing its full 960GB capacity every day throughout its warranty period, which is more than sufficient for typical OS, boot, logging, and mainstream enterprise application workloads. In practical terms, under common system-drive or read-intensive server usage, this level of endurance provides long-term peace of mind and can comfortably support many years of stable operation without endurance being a concern. For enterprise reliability, this SSD includes Power Loss Protection (PLP), which helps preserve in-flight data and protect metadata integrity if power is unexpectedly interrupted, reducing the risk of corruption and downtime. 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 robust design for continuous operation.

Technical Specs & Insights

1. The SAS 12.0 Gbps interface, paired with strong sequential read bandwidth, integrates cleanly into dual-controller enterprise storage and accelerates large-block workloads such as backup, media streaming, and data warehouse scans.
2. With 1300 MB/s sequential read performance, the drive shortens bulk data access time for analytics clusters, virtual machine boot storms, and restore operations.
3. Its 200K random read IOPS capability helps databases and virtualized environments sustain responsive performance under highly fragmented, multi-tenant access patterns.
4. A 1 DWPD endurance rating makes it a practical fit for read-centric enterprise applications that still require predictable write tolerance across the full service life of the SSD.
5. Built on Samsung 48-layer 3D TLC V-NAND with a typical latency of 100 µs, the drive balances cost-efficient flash density with the fast response times needed for transactional business systems.

Capacity Sweet

Reference capacities in the same series for MPN MZILS960HEHP0D4: Lower capacity: 480 GB Higher capacity: 1.92 TB Capacity positioning analysis: In this product family, the 960 GB model sits at the practical sweet spot. Compared with the 480 GB version, it gives noticeably more headroom for OS images, application binaries, logs, and short-term data growth, reducing early capacity pressure without changing the expected enterprise performance profile. Compared with the 1.92 TB option, it usually offers a better balance between acquisition cost, usable capacity, and consistent latency. It is especially well suited for mid-sized virtualization clusters, such as hosting boot and middleware volumes for around 40 to 60 business application instances.

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