General

Brand	Samsung
Model	SM1635
Capacity	800GB
Usage Class	Enterprise

Interface

Host Interface	SAS
Total Interface Bandwidth	12 Gb/s

Physical Dimension

Form Factor	2.5

Flash & Endurance

NAND Flash	TLC V-NAND
Drive Writes Per Day	10
Total Bytes Written	14600 TBW

Performance

Sequential Read	1480 MB/s
Sequential Write	1340 MB/s
Random Read IOPS	195000
Random Write IOPS	140000
Average Latency	85 μs

Reliability

Mean Time Between Failures	2.5 Million Hours
Uncorrectable Bit Error Rate	1.0×10⁻¹⁷
Power Loss Protection	Yes

Part Number

MPN	MZILS800HEHP

Engineer's Note

Compared with the previous-generation MZILS800HEHP, the MZIES800HMHP-00003 (SM1635) advances the 800GB SAS tier by pairing TLC V-NAND with a full 10 DWPD rating and 14,600 TBW, giving architects a stronger endurance-to-cost profile without sacrificing enterprise write intensity. With 1,480/1,340 MB/s sequential throughput and up to 195,000/140,000 IOPS, it is a particularly strong fit for write-heavy OLTP databases, virtualization logs, and mixed enterprise workloads that need SAS reliability with high sustained performance.

Endurance & Reliability

With an endurance rating of 14,600 TBW and 10 DWPD, the MZIES800HMHP-00003 is built for very write-intensive enterprise workloads and can comfortably handle repeated full-drive writes every day throughout its warranty period. In typical real-world use, this level of endurance is far beyond what a system or boot drive usually experiences, giving procurement teams strong confidence that the drive will remain dependable even under sustained heavy operation. This model also includes Power Loss Protection (PLP), which helps preserve in-flight data and protects metadata integrity if power is interrupted unexpectedly, reducing the risk of corruption and unplanned recovery events. Its UBER specification of 1.0E-17, together with a 2.5 million hour MTBF, reflects enterprise-class data reliability and low error rates, making it well suited for business-critical storage environments.

Technical Specs & Insights

1. The enterprise SAS interface provides proven dual-port availability and seamless integration into mission-critical storage arrays where uptime and serviceability matter most.
2. Its strong sequential read performance accelerates backup restores, large database scans, and analytics workloads by moving bulk data quickly through the pipeline.
3. High random read capability enables fast response under heavily concurrent virtualization and OLTP environments, helping more users and VMs access data without bottlenecks.
4. With a write endurance profile built for sustained daily overwrite cycles, this drive is well suited for cache tiers, logging, and mixed-workload enterprise applications that cannot tolerate early wear-out.
5. TLC V-NAND paired with very low typical latency delivers an efficient balance of capacity, consistency, and snappy application response for latency-sensitive business systems.

Capacity Sweet

Lower capacity reference: 400GB Higher capacity reference: 1.6TB Capacity positioning analysis: In this SSD family, the 800GB model sits in the sweet spot between the 400GB and 1.6TB options. Compared with 400GB, it gives noticeably better headroom for OS, logs, hot data, and future growth, reducing the risk of early capacity pressure in production. Compared with 1.6TB, it usually delivers a more efficient cost-per-deployment while maintaining essentially the same enterprise-class sequential throughput and random IOPS profile. It is especially well suited for mid-sized virtualization clusters, such as hosting boot and application volumes for around 40 to 60 virtual machines.

FAQ