Samsung MZILS960HCHP-000D4 960GB PM1633a SAS 12Gb/s 2.5 inch Enterprise Solid State Drive

General

Brand	Samsung
Model	PM1633a
Capacity	960GB
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	1752 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 Million Hours
Uncorrectable Bit Error Rate	1.0×10⁻¹⁷
Power Loss Protection	Yes

Part Number

MPN	MZILS960HCHP

Engineer's Note

Compared with the earlier MZILS960HCHP, the PM1633a MZILS960HCHP-000D4 is a later 960GB enterprise SAS revision that pairs Samsung 3bit V-NAND with 12Gb/s connectivity and 1752 TBW endurance to deliver a more balanced mix of capacity, reliability, and service-life consistency. With up to 1200/900 MB/s sequential throughput and 190,000/37,000 IOPS, it is a strong fit for read-centric virtualization, database, and server storage tiers that need higher random-read density and dual-port SAS robustness over typical 1-DWPD SATA-class SSDs.

Endurance & Reliability

With an endurance rating of 1,752 TBW and 1 DWPD, this SSD is built to handle writing its full usable capacity once per day across its warranted service life, which is more than sufficient for typical enterprise boot, OS, virtualization, and read-intensive application workloads. In practical terms, for use as a system drive or in common mixed-workload deployments, it provides long-term write endurance with ample margin, helping buyers deploy it with confidence for many years of normal operation. This model also includes enterprise-class reliability features such as Power Loss Protection (PLP), which helps preserve in-flight data and protect metadata integrity if power is suddenly interrupted. Its UBER rating of 1.0E-17 indicates an extremely low probability of unrecoverable bit errors, supporting high data integrity expectations in business-critical storage environments.

Technical Specs & Insights

1. The SAS 12Gb/s interface, paired with 1200 MB/s sequential read speed, gives enterprise arrays predictable compatibility and fast enough streaming performance to accelerate backup, restore, and large-block data access without disrupting existing SAS infrastructure.
2. With 190,000 K IOPS random read capability, the drive can sustain highly concurrent small-block workloads, helping databases and virtualized environments respond faster during peak transaction periods.
3. A 1 DWPD endurance rating makes it a solid fit for read-centric enterprise deployments, providing a balanced write budget for mixed workloads while keeping lifecycle planning and replacement costs under control.
4. Samsung V-NAND 3bit MLC (TLC) enables higher flash density with enterprise-focused optimization, delivering a practical balance of capacity, power efficiency, and cost effectiveness for scale-out storage platforms.
5. The 110 µs typical latency supports consistently quick access to active data, reducing application wait time and improving service responsiveness in latency-sensitive server workloads.

Capacity Sweet

Lower capacity reference: 480GB Higher capacity reference: 1.92TB Capacity positioning analysis: In this SSD family, the 960GB model sits at the practical sweet spot. Compared with the 480GB version, it offers much better headroom for OS images, logs, hot data, and future growth, reducing the risk of early capacity pressure. Compared with the 1.92TB option, it preserves nearly the same enterprise-class throughput and IOPS while delivering a more attractive cost-to-performance balance. This makes 960GB especially suitable for mid-scale virtualization clusters, such as hosting boot and application volumes for about 40 to 60 general-purpose virtual machines.

FAQ