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| Brand | Samsung |
|---|---|
| Model | PM1635 |
| Capacity | 800GB |
| Usage Class | Enterprise |
| Host Interface | SAS 12Gb/s |
|---|---|
| Total Interface Bandwidth | 12 Gb/s |
| Form Factor | 2.5 |
|---|
| NAND Flash | Samsung V-NAND 2bit MLC |
|---|---|
| Drive Writes Per Day | 3 |
| Total Bytes Written | 4380 TBW |
| Sequential Read | 940 MB/s |
|---|---|
| Sequential Write | 560 MB/s |
| Random Read IOPS | 190000 |
| Random Write IOPS | 35000 |
| Average Latency | 110 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZILS800HCHP |
|---|
Compared with the earlier MZILS800HCHP, the MZ-ILS8000 PM1635 brings a clear generational step forward in enterprise SAS SSD design by pairing Samsung V-NAND 2bit MLC with 12Gb/s SAS performance up to 940/560 MB/s and endurance rated at 3 DWPD, 4,380 TBW. Its standout value in the 800GB class is the combination of 190,000 random-read IOPS and sustained write durability, making it a stronger fit than its predecessor for latency-sensitive OLTP, virtualization, and mixed read/write database workloads.
With an endurance rating of 4,380 TBW, the MZ-ILS8000 is designed to handle very heavy write activity over its service life, equivalent to roughly 12 TB of writes per day across the 1-year warranty period. In typical server, boot, edge, or industrial workloads that write far less than this, it provides a strong endurance margin and can be used with high confidence for sustained daily operation. For enterprise reliability, the drive includes power-loss protection (PLP), which helps preserve in-flight data and protects metadata integrity if power is unexpectedly interrupted. Its UBER rating of 1.0E-17, together with a 2 million-hour MTBF, indicates enterprise-class data integrity and long-term operational dependability for business-critical deployments.
1. The SAS 12Gb/s interface enables dual-port, enterprise-grade connectivity, improving high-availability storage designs and simplifying integration into mission-critical server and array environments.
2. With sequential read performance of 940 MB/s, the drive accelerates large-block data access, reducing backup, restore, and analytics job completion times.
3. Its 190,000 K IOPS random read capability, paired with 110 µs typical latency, keeps database, virtualization, and OLTP workloads highly responsive under heavy concurrent access.
4. The 3 DWPD endurance rating supports sustained write-intensive operation, making the SSD a reliable fit for caching, logging, and mixed-workload enterprise applications over its service life.
5. Samsung V-NAND 2bit MLC delivers stronger write endurance and performance consistency than lower-cost flash types, helping maintain predictable QoS in always-on datacenter deployments.
Lower capacity reference: 400GB Higher capacity reference: 1.6TB Within the MZ-ILS series, the 800GB model sits at a practical sweet spot. Compared with the 400GB version, it provides much better headroom for OS images, application growth, logs, and overprovisioning flexibility, reducing the risk of early capacity pressure. Compared with the 1.6TB option, it delivers a more balanced acquisition cost while keeping broadly similar enterprise-class sequential and random I/O behavior for mainstream workloads. This makes 800GB especially well suited for mid-sized virtualization clusters, such as shared boot and application storage for about 40 to 60 business service instances.
Q: Is MZ-ILS8000 suitable for a write-heavy database server?
A: Yes. The MZ-ILS8000 is well suited for write-heavy database workloads, thanks to its 3 DWPD endurance, 4380 TBW rating, low 110 µs typical latency, and enterprise-grade Samsung V-NAND 2-bit MLC.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This model is rated for 3 DWPD, meaning it can support approximately three full 800GB drive writes per day throughout its warranty period, consistent with its total endurance rating of 4380 TBW.
Q: Does it include power loss protection (PLP) and why is that critical?
A: Yes, it includes power loss protection. PLP is critical in enterprise environments because it helps preserve in-flight data and metadata during sudden power failure, reducing corruption risk and improving storage reliability.
Q: What RAID level is recommended for this SSD?
A: RAID 10 is generally recommended for this SSD in performance-sensitive environments, especially databases. It provides strong read/write performance, redundancy, and faster rebuild behavior compared with parity-based RAID configurations.