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| Brand | Samsung |
|---|---|
| Model | PM1645a |
| Capacity | 1.6TB |
| 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 | 8760 TBW |
| Sequential Read | 1000 MB/s |
|---|---|
| Sequential Write | 1000 MB/s |
| Random Read IOPS | 230000 |
| Random Write IOPS | 130000 |
| Average Latency | 120 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZ-IL1T6A |
|---|
Compared with the previous-generation MZ-IL1T6A, the 1.6TB PM1645a (MZILT1T6HBJR-00AH3) moves to a newer TLC V-NAND SAS platform that delivers up to 1,000/1,000 MB/s and 230K/130K IOPS while maintaining enterprise-grade 3 DWPD endurance at 8,760 TBW. This makes it a stronger fit for mixed OLTP, virtualization, and read/write-intensive database workloads where consistent latency, high write sustainability, and better performance density than legacy SAS SSDs are critical.
With an endurance rating of 8,760 TBW and 3 DWPD, the MZILT1T6HBJR-00AH3 is designed for sustained write-intensive enterprise use over its intended service life. In practical terms, this level of endurance is far beyond typical OS, boot, and general application workloads, meaning it can serve as a highly dependable system drive for many years under normal operating conditions. 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 of 1.0E-17 indicates an extremely low probability of unrecoverable bit errors, supporting high data integrity, while the 2 million-hour MTBF further reflects a robust design suitable for business-critical environments.
1. The SAS interface brings dual-port enterprise connectivity and proven high-availability behavior, while its strong sequential read performance helps accelerate backup restores, media streaming, and large dataset scans.
2. High random read capability translates into faster response for virtualization clusters, OLTP databases, and metadata-heavy workloads that depend on quick access to many small files.
3. A 3 DWPD endurance rating makes this drive a solid fit for write-intensive enterprise environments such as logging, transactional systems, and mixed-use server storage.
4. TLC V-NAND balances cost efficiency, density, and consistent enterprise performance, enabling larger flash deployments without sacrificing operational practicality.
5. Low typical latency helps reduce application wait time, improving user responsiveness and transaction efficiency in latency-sensitive server workloads.
Lower capacity reference: 800GB Higher capacity reference: 3.2TB Capacity positioning analysis: Within this SAS enterprise SSD family, the 1.6TB model sits at a practical sweet spot. Compared with the 800GB version, it provides much better headroom for OS images, logs, metadata, and application growth, reducing early capacity pressure in steady-state deployments. Compared with the 3.2TB option, it typically delivers a more attractive cost-per-node while maintaining essentially the same class of sequential and random performance. This makes 1.6TB especially well suited for mid-scale virtualization clusters, such as hosting boot and application volumes for roughly 40 to 60 business service VMs.
Q: Is MZILT1T6HBJR-00AH3 suitable for a write-heavy database server?
A: Yes. With 3 DWPD endurance, 8,760 TBW, TLC V-NAND, SAS interface, and 120 µs typical latency, MZILT1T6HBJR-00AH3 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: This model is rated for 3 DWPD, meaning it can sustain three full 1.6TB drive writes per day across its warranty period, aligning with its total endurance rating of 8,760 TBW.
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, reducing corruption risk and improving reliability for transactional and enterprise storage environments.
Q: What RAID level is recommended for this SSD?
A: RAID 10 is commonly recommended for this SSD in performance-sensitive and write-heavy environments, as it balances redundancy and speed. RAID 5 or 6 may fit capacity-focused workloads with write penalties.