Samsung MZ-ILS1T9A 1.92TB PM1633 SAS 12Gb/s 2.5 inch Enterprise Solid State Drive

General

Brand	Samsung
Model	PM1633
Capacity	1.92TB
Usage Class	Enterprise

Interface

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

Physical Dimension

Form Factor	2.5

Flash & Endurance

NAND Flash	Samsung V-NAND 3bit MLC (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	160000
Random Write IOPS	18000
Average Latency	110 μs

Reliability

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

Part Number

MPN	MZILS1T9HMLH

Engineer's Note

Compared with the previous-generation MZILS1T9HMLH, the MZ-ILS1T9A PM1633 delivers a more optimized 1.92TB enterprise SAS profile by combining Samsung V-NAND 3bit MLC, 12Gb/s host connectivity, and read-intensive endurance of 1 DWPD / 3504 TBW in a denser, lower-cost-per-GB configuration. For mixed enterprise read-heavy workloads such as virtualized infrastructure, scale-out storage, and database serving, it stands out in its class with up to 1200/900 MB/s sequential performance and 160K/18K IOPS, giving architects a stronger balance of usable capacity, SAS compatibility, and lifecycle value than the older MZILS1T9HMLH.

Endurance & Reliability

With an endurance rating of 3504 TBW and 1 DWPD, the MZ-ILS1T9A is designed to handle writing its full capacity once per day throughout its rated service life, which is well aligned with typical enterprise read-intensive and mixed-use workloads. In practical terms, for common OS, boot, application, logging, and general server storage scenarios, this level of endurance provides long-term peace of mind and can comfortably support many years of normal operation without wear being a concern. For enterprise reliability, the drive includes Power Loss Protection (PLP), which helps preserve in-flight data and protects metadata integrity during unexpected power interruptions, reducing the risk of corruption or incomplete writes. Its UBER of 1.0E-17 and 2 million-hour MTBF indicate a very low uncorrectable bit error rate and strong overall dependability, giving buyers added confidence for business-critical deployments.

Technical Specs & Insights

1. The SAS interface integrates seamlessly into dual-controller enterprise storage environments, enabling high availability, mature manageability, and predictable performance for mission-critical infrastructure.
2. Its strong sequential read bandwidth accelerates large-block workloads such as backup restore, analytics scans, and media streaming, helping reduce data access bottlenecks in shared storage systems.
3. With high random read capability and low typical latency, the drive supports fast response times for virtualization, OLTP databases, and metadata-heavy applications where consistent transaction servicing matters most.
4. The endurance profile is well suited for read-centric enterprise deployments, giving IT teams a dependable option for boot, content delivery, and mixed-duty storage without overpaying for unnecessary write headroom.
5. Samsung V-NAND TLC balances capacity, efficiency, and proven enterprise reliability, making it a practical fit for scale-out platforms that need solid cost-per-terabyte without sacrificing data-center-grade stability.

Capacity Sweet

Lower capacity reference: 960GB Higher capacity reference: 3.84TB At 1.92TB, the MZ-ILS1T9A sits in the sweet spot of the series. Compared with the 960GB model, it provides much better headroom for dataset growth, RAID overprovisioning, and mixed enterprise workloads without forcing early capacity expansion. Compared with the 3.84TB version, it usually delivers a more attractive cost-per-deployment while keeping essentially the same enterprise-class sequential throughput and random IOPS profile. This makes 1.92TB an excellent fit for mid-scale virtualization clusters, database nodes, and hyperconverged storage pools serving roughly 40 to 80 mixed business application instances.

FAQ