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| Brand | Samsung |
|---|---|
| Model | PM1633a |
| Capacity | 3.84TB |
| 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 | 7008 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 | MZILS3T8HMLH |
|---|
Compared with the earlier MZILS3T8HMLH, the PM1633a (MZ-ILS3T8B) moves to newer Samsung V-NAND and delivers a stronger enterprise endurance profile with 7008 TBW at 1 DWPD, making it a more robust long-life choice for 12Gb/s SAS deployments. At 3.84TB, it combines 1200/900 MB/s sequential throughput with 190,000/37,000 IOPS, giving virtualized storage, database, and mixed-read/write server workloads a well-balanced upgrade in capacity, consistency, and service life.
With an endurance rating of 7008 TBW and 1 DWPD, the MZ-ILS3T8B is designed to handle a full drive write per day across its usable life, which is more than sufficient for typical enterprise boot, system, and read-heavy application workloads. In practical terms, under normal OS and infrastructure usage, this level of endurance supports long-term deployment with confidence and can comfortably serve as a stable system drive for many years. For enterprise reliability, built-in power loss protection (PLP) helps preserve data in flight during an unexpected power interruption, reducing the risk of corruption and improving operational safety. Its UBER rating of 1.0E-17 indicates an extremely low unrecoverable bit error rate, meaning a very high standard of data integrity that procurement teams expect from enterprise-class SSDs.
1. The SAS 12Gb/s interface, paired with 1200 MB/s sequential read performance, enables fast bulk data ingestion and predictable throughput in dual-controller storage arrays and mission-critical database backup environments.
2. With 190,000 K IOPS random read capability, the drive sustains responsive access under highly fragmented workloads such as OLTP databases, virtual desktop farms, and metadata-heavy enterprise applications.
3. A 1 DWPD endurance rating provides the write tolerance needed for mixed-use enterprise deployments, helping operators maintain service life consistency across always-on business workloads.
4. Samsung V-NAND 3bit MLC (TLC) balances cost efficiency, density, and flash reliability, making it well suited for scale-out datacenters that need dependable capacity without premium media cost.
5. A typical latency of 110 µs helps reduce storage wait time at the application layer, improving transaction responsiveness and overall QoS in latency-sensitive enterprise systems.
In the same series, the next lower capacity is 1.92TB and the next higher capacity is 7.68TB. The 3.84TB model sits at the sweet spot of the lineup: it offers clearly better headroom than 1.92TB for OS images, application growth, logs, and snapshot overhead, while avoiding the higher acquisition cost of 7.68TB where performance remains broadly similar for typical enterprise workloads. This makes 3.84TB the best balance of usable capacity, cost efficiency, and predictable performance, especially for medium-scale virtualization clusters, database nodes, or dense mixed-workload application servers.
Q: Is MZ-ILS3T8B suitable for a write-heavy database server?
A: MZ-ILS3T8B can support mixed and moderate write-intensive database workloads, but with 1 DWPD, it is not the best choice for highly write-heavy servers requiring sustained intensive daily overwrites.
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 3.84TB drive write per day across its warranty period, aligned with its 7008TB TBW endurance rating.
Q: Does it include power loss protection (PLP) and why is that critical?
A: Yes, it includes power loss protection. PLP is critical because it helps preserve in-flight data and mapping tables during unexpected outages, reducing corruption risk and improving enterprise data integrity.
Q: What RAID level is recommended for this SSD?
A: Recommended RAID level depends on workload. RAID 10 is preferred for databases needing strong performance and redundancy, while RAID 5 or RAID 6 may suit capacity-focused read-heavy enterprise environments.