Samsung MZILS1T9HEJH-000D4 1.92TB PM1633a Series SAS 12Gb/s 2.5 15mm Enterprise Data Center / Read Intensive Solid State Drive

General

Brand	Samsung
Model	PM1633a Series
Capacity	1.92TB
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 48-layer 3D V-NAND TLC
Drive Writes Per Day	1
Total Bytes Written	3504 TBW

Performance

Sequential Read	1200 MB/s
Sequential Write	900 MB/s
Random Read IOPS	190000
Random Write IOPS	37000
Average Latency	110 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	MZILS1T9HCHP

Engineer's Note

Compared with the previous-generation MZILS1T9HCHP, the Samsung PM1633a MZILS1T9HEJH-000D4 leverages 48-layer 3D V-NAND TLC to deliver a denser, more endurance-efficient 1.92TB SAS 12Gb/s platform with sustained 1,200/900 MB/s throughput and up to 190,000/37,000 IOPS. Its 1 DWPD rating and 3,504 TBW make it a strong fit for read-heavy virtualized infrastructure, enterprise boot/storage tiers, and mixed database workloads that need better capacity-per-slot and a more balanced performance-to-endurance profile than older SAS SSD generations.

Endurance & Reliability

With an endurance rating of 3504 TBW, this SSD is designed to handle approximately 3.5 petabytes of total writes, which is far beyond the write volume of typical OS, boot, and application workloads. In practical terms, if used as a system or read-heavy enterprise drive, where daily writes are usually well below 1 TB, it can comfortably support around 10 years of normal operation from an endurance perspective. For enterprise reliability, built-in Power Loss Protection (PLP) helps preserve in-flight data and critical mapping information during an unexpected power interruption, reducing the risk of data loss or corruption. Its UBER of 1.0E-17 means an extremely low uncorrectable bit error rate, and together with the 2 million hour MTBF, it provides the level of data integrity and operational stability expected for business-critical deployments.

Technical Specs & Insights

1. The SAS 12Gb/s interface preserves dual-port enterprise connectivity and broad storage-array compatibility, making it a dependable choice for mission-critical servers that prioritize availability and serviceability.
2. Sequential read performance of 1200 MB/s accelerates large-block data movement, helping databases, backup platforms, and analytics workloads complete scans and restores faster.
3. Random read performance of 190,000 K IOPS enables the drive to sustain heavy transactional pressure, improving responsiveness for virtualized environments and read-intensive OLTP applications.
4. A 1 DWPD endurance rating supports consistent daily full-drive writes across the warranty period, giving enterprises a predictable fit for mainstream mixed-use workloads without overprovisioning for unnecessary write headroom.
5. Samsung 48-layer 3D V-NAND TLC, paired with a typical latency of 110 µs, delivers a practical balance of flash density, cost efficiency, and low access delay for stable application QoS in shared infrastructure.

Capacity Sweet

Lower-capacity reference: 960GB Higher-capacity reference: 3.84TB In this enterprise SSD family, 1.92TB is the sweet-spot capacity. Compared with the 960GB model, it gives meaningfully more headroom for OS images, application growth, logging, and overprovisioning flexibility, reducing early capacity pressure in mixed workloads. Compared with the 3.84TB option, it typically delivers the same class of sequential throughput and random IOPS while keeping acquisition cost and per-node storage allocation more balanced. It is best suited for mid-scale virtualization or database clusters, such as hosting boot and hot data for roughly 25 to 40 business application instances.

FAQ