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| Brand | Samsung |
|---|---|
| Model | PM1635a |
| Capacity | 800GB |
| Usage Class | Enterprise |
| Host Interface | SAS |
|---|---|
| Total Interface Bandwidth | 12 Gb/s |
| Form Factor | 2.5 |
|---|
| NAND Flash | TLC V-NAND |
|---|---|
| Drive Writes Per Day | 3 |
| Total Bytes Written | 4380 TBW |
| Sequential Read | 940 MB/s |
|---|---|
| Sequential Write | 800 MB/s |
| Random Read IOPS | 197000 |
| Random Write IOPS | 60000 |
| Average Latency | 110 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZILS800HEHP-000G3 |
|---|
The Samsung PM1635a 800GB (MZILS800HEHP-000C4) stands out as a 12Gb/s SAS enterprise SSD that combines TLC V-NAND efficiency with a durable 3 DWPD / 4,380 TBW profile, delivering up to 940/800 MB/s and 197K/60K IOPS for latency-sensitive mixed workloads. Compared with the previous MPN MZILS800HEHP-000G3, this revision offers a clear generational step forward in sustained throughput and random-access responsiveness while preserving enterprise-class endurance, making it the stronger choice for database, virtualization, and transactional storage tiers.
With an endurance rating of 4,380 TBW and 3 DWPD, the MZILS800HEHP-000C4 is built to sustain heavy daily write activity over its intended service life, making it well suited for enterprise system, cache, and mixed-use workloads. In typical deployment scenarios, this level of endurance means buyers can expect long-term stability and ample write headroom, rather than worrying about premature wear under normal business operation. Its enterprise reliability is further strengthened by power loss protection (PLP), which helps preserve in-flight data and mapping information during unexpected power interruptions, reducing the risk of data corruption and unplanned downtime. Combined with an ultra-low UBER of 1.0E-17 and a 2 million hour MTBF, this SSD is designed to deliver very high data integrity and dependable operation in business-critical environments.
1. The SAS interface enables dual-port enterprise connectivity and predictable compatibility in mission-critical storage arrays, helping maintain high availability during controller failover and multipath operations.
2. Its strong sequential read performance accelerates large-block workloads such as backup recovery, media streaming, and data warehouse scans, reducing time to access bulk datasets.
3. The high random read capability is well suited for virtualization, OLTP databases, and metadata-heavy applications, sustaining fast response under highly concurrent small-block access patterns.
4. With a 3 DWPD endurance rating, this drive is built for write-intensive enterprise use cases, giving IT teams the confidence to run caching, logging, and mixed-workload applications over a long service life.
5. TLC V-NAND paired with low typical latency delivers a balanced combination of capacity efficiency, cost-effective enterprise endurance, and consistently quick access times for latency-sensitive workloads.
Lower reference capacity: 400GB Higher reference capacity: 1.6TB In this SSD family, the 800GB model sits at a practical sweet spot. Compared with the 400GB version, it gives noticeably better headroom for OS images, databases, logs, and growth over a longer refresh cycle, while keeping the same enterprise-class read/write and random IOPS profile. Compared with the 1.6TB option, it delivers a more balanced cost-per-drive without overcommitting budget to capacity that may stay unused. It is best suited for mid-scale infrastructure, such as boot and application storage for about 40 to 60 virtualized business workloads.
Q: Is MZILS800HEHP-000C4 suitable for a write-heavy database server?
A: Yes. With 3 DWPD endurance, 4380 TBW, TLC V-NAND, SAS interface, and 110 µs typical latency, the MZILS800HEHP-000C4 is well suited for write-intensive database and enterprise workloads.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: It is rated for 3 full drive writes per day. For an 800GB SSD, that equals about 2.4TB of writes daily across the warranty period under normal supported conditions.
Q: Does it include power loss protection (PLP) and why is that critical?
A: Yes, it includes power loss protection. PLP helps preserve in-flight data and metadata during sudden outages, reducing corruption risk and improving reliability for transactional, enterprise, and database environments.
Q: What RAID level is recommended for this SSD?
A: RAID choice depends on your priority. RAID 10 is generally recommended for database workloads requiring strong performance and redundancy, while RAID 5 or RAID 6 may fit capacity-focused deployments.