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| Brand | Samsung |
|---|---|
| Model | PM1633a |
| Capacity | 960GB |
| Usage Class | Enterprise |
| Host Interface | SAS 12Gb/s |
|---|---|
| Total Interface Bandwidth | 12 Gb/s |
| Form Factor | 2.5 |
|---|
| NAND Flash | Samsung V-NAND 3bit MLC (TLC) |
|---|---|
| Drive Writes Per Day | 1 |
| Total Bytes Written | 1752 TBW |
| Sequential Read | 1200 MB/s |
|---|---|
| Sequential Write | 900 MB/s |
| Random Read IOPS | 190000 |
| Random Write IOPS | 37000 |
| Average Latency | 110 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZILS960HCHP |
|---|
Compared with the predecessor MZILS960HCHP, the Samsung PM1633a (MZILS960HEHP-000D4) delivers a newer-generation 12Gb/s SAS platform with Samsung V-NAND 3bit MLC (TLC), combining 960GB of enterprise capacity with a balanced 1200/900 MB/s throughput profile and 190K/37K IOPS for more efficient mixed-read/write operation. With 1 DWPD and 1,752 TBW, it offers a stronger endurance-per-drive proposition for space-constrained enterprise arrays than legacy SAS SSDs in the same class, making it a solid fit for virtualization clusters, OLTP, and read-intensive database tiers.
With an endurance rating of 1,752 TBW and 1 DWPD, the MZILS960HEHP-000D4 is built to handle writing its full 960GB capacity once per day throughout its rated service life, which is more than sufficient for typical enterprise boot, OS, and mixed-read workloads. In practical terms, for common system-disk or infrastructure use cases, this level of endurance supports many years of stable operation without endurance becoming a concern under normal deployment conditions. For enterprise reliability, the drive includes Power Loss Protection (PLP), which helps preserve in-flight data and metadata during an unexpected power interruption, reducing the risk of corruption and improving system recoverability. Its Uncorrectable Bit Error Rate (UBER) of 1.0E-17, together with a 2 million hour MTBF, indicates very strong data integrity and dependable long-term operation expected from enterprise-class SSDs.
1. The SAS 12Gb/s interface provides dual-port enterprise connectivity and broad server compatibility, making it a dependable choice for high-availability storage arrays and mission-critical infrastructure.
2. Its strong sequential read performance accelerates large-block data access, helping backup, media streaming, and data warehousing workloads complete faster with less host wait time.
3. The high random read capability enables rapid response to small-block transactions, which is especially valuable for virtualized environments, OLTP databases, and metadata-heavy applications.
4. Rated at 1 DWPD, this drive is well suited for mixed-use enterprise deployments that need predictable endurance for daily business writes without overpaying for extreme write-intensive media.
5. Built with Samsung V-NAND 3-bit MLC (TLC), it balances cost, density, and enterprise-grade reliability, while the low typical latency helps reduce application response time and improve QoS consistency under load.
Lower capacity reference: 480GB Higher capacity reference: 1.92TB The 960GB model sits at the sweet spot of this SSD family. Compared with the 480GB version, it offers much better capacity headroom for OS images, application data, logs, and growth buffers, reducing early replacement pressure while keeping similar enterprise-class throughput and IOPS behavior. Compared with the 1.92TB option, it delivers a more balanced cost-per-drive and budget efficiency without giving up the steady read/write performance profile expected in mainstream enterprise deployments. It is especially well suited for mid-sized virtualization clusters, such as hosting boot and application volumes for about 40 to 60 virtual machines.
Q: Is MZILS960HEHP-000D4 suitable for a write-heavy database server?
A: It can support moderate database workloads, but for truly write-heavy servers, its 1 DWPD rating may be limiting. We typically recommend higher-endurance SSDs for sustained intensive write activity.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This model is rated at 1 DWPD, meaning it can handle one full 960GB drive write per day across its warranty period, consistent with its 1752 TBW endurance specification.
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, which is critical for maintaining data integrity and preventing corruption in enterprise environments.
Q: What RAID level is recommended for this SSD?
A: The best RAID level depends on your priority. RAID 1 or RAID 10 is typically recommended for strong performance and redundancy, while RAID 5 or 6 suits capacity-focused deployments.