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| Brand | Samsung |
|---|---|
| Model | PM1633a Series |
| Capacity | 7.68TB |
| Usage Class | Enterprise Data Center / Read Intensive |
| Host Interface | SAS 12Gb/s |
|---|---|
| Total Interface Bandwidth | 12 Gb/s |
| Form Factor | 2.5 15mm |
|---|
| NAND Flash | Samsung 48-layer 3D V-NAND TLC |
|---|---|
| Drive Writes Per Day | 1 |
| Total Bytes Written | 14016 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 | 2.0 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZILS7T6HCJM |
|---|
Compared with the earlier MZILS7T6HCJM, the MZILS7T6HMLS-000C3 in Samsung’s PM1633a Series delivers a more modern enterprise SAS design built on 48-layer 3D V-NAND TLC, giving storage architects a stronger balance of 7.68TB density, 14,016 TBW endurance, and predictable 12Gb/s SAS integration. With up to 1200/900 MB/s sequential throughput and 190,000/37,000 IOPS, it is a particularly strong choice for virtualization clusters, scale-out databases, and mixed read/write enterprise tiers that need higher usable capacity without stepping up to a higher-DWPD cost point.
With an endurance rating of 14,016 TBW and 1 DWPD, the MZILS7T6HMLS-000C3 is built to handle a full drive write every day across its warranty life, which is more than sufficient for typical enterprise system, boot, and read-centric application workloads. In practical terms, this level of endurance means buyers can expect long-term, predictable operation under normal server usage, and in lighter-duty roles such as OS or infrastructure drives, it can comfortably support many years of service. 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, reducing the risk of corruption during outages. Its UBER rating of 1.0E-17 indicates an extremely low probability of unrecoverable bit errors, supporting high data integrity expectations in business-critical environments, while the 2 million-hour MTBF further reflects a design focused on dependable continuous operation.
1. Its enterprise SAS interface, paired with strong sequential throughput, accelerates full-volume scans, backup jobs, and large file movement while preserving the high availability and compatibility expected in dual-controller storage systems.
2. The high random read capability helps virtualized databases, metadata services, and read-heavy OLTP workloads return small-block data faster, improving user responsiveness under heavy concurrency.
3. The rated write endurance supports predictable daily rewrite cycles, making it a solid fit for mixed-use enterprise environments that need steady performance without overpaying for extreme write durability.
4. Samsung’s 3D V-NAND TLC design balances capacity, power efficiency, and cost, enabling denser storage deployments for mainstream enterprise applications without sacrificing datacenter-class reliability.
5. The low typical latency reduces storage wait time per I/O, helping transaction platforms and latency-sensitive applications deliver more consistent SLA performance during peak demand.
Lower capacity reference: 3.84TB Higher capacity reference: 15.36TB In this series, the 7.68TB model is the sweet-spot capacity. Compared with the 3.84TB option, it provides much better space headroom for dataset growth, VM density, and write buffering, reducing the need for early drive expansion. Compared with the 15.36TB version, it usually delivers the best balance of acquisition cost, usable capacity, and enterprise-grade performance consistency, since sequential throughput and random IOPS remain broadly similar across capacities. It is well suited for mid-scale virtualization clusters, mixed database nodes, or a 2U server hosting around 150 to 250 general-purpose virtual desktops.
Q: Is MZILS7T6HMLS-000C3 suitable for a write-heavy database server?
A: MZILS7T6HMLS-000C3 is better suited for mixed-use or read-intensive database workloads. With 1 DWPD and 14,016 TBW, it supports steady writes, but not the most demanding write-heavy enterprise environments.
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 sustain one full 7.68TB drive write per day throughout its warranty period, consistent with its 14,016TB total endurance rating.
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 unexpected outages, which is critical for maintaining data integrity and reducing corruption risks in enterprise systems.
Q: What RAID level is recommended for this SSD?
A: The recommended RAID level depends on workload priorities. RAID 10 is ideal for performance and redundancy, while RAID 5 or RAID 6 can be considered when balancing usable capacity with protection.