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| Brand | Samsung |
|---|---|
| Model | PM1645a |
| Capacity | 1.6TB |
| Usage Class | Mixed Use |
| Host Interface | SAS 12G |
|---|---|
| Total Interface Bandwidth | 12 Gb/s |
| Form Factor | 2.5-inch |
|---|
| NAND Flash | Samsung V-NAND TLC |
|---|---|
| Drive Writes Per Day | 3 |
| Total Bytes Written | 8760 TBW |
| Sequential Read | 2100 MB/s |
|---|---|
| Sequential Write | 2000 MB/s |
| Random Read IOPS | 400000 |
| Random Write IOPS | 110000 |
| Average Latency | 95 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZILT1T6HAJQ |
|---|
Compared with the previous-generation MZILT1T6HAJQ, the Samsung PM1645a (MZILT1T6HBJRAD3) advances to a newer V-NAND TLC platform that delivers up to 2100/2000 MB/s sequential throughput and 400,000/110,000 IOPS, giving SAS 12G infrastructures a clear boost in mixed-workload responsiveness. With 1.6TB capacity, 3 DWPD endurance, and 8,760 TBW, it is a strong fit for enterprise database, virtualization, and transaction-heavy storage tiers that need higher sustained performance without moving off the SAS ecosystem.
With an endurance rating of 8,760 TBW and 3 DWPD, the MZILT1T6HBJRAD3 is designed to handle very heavy write-intensive workloads across its service life. In typical enterprise use, this means it can comfortably serve as a system disk or application drive for many years, with ample write headroom for continuous daily operation. For enterprise reliability, built-in Power Loss Protection (PLP) helps preserve in-flight data and protect metadata integrity if power is suddenly interrupted. Its ultra-low UBER of 1.0E-17, together with a 2 million hour MTBF, indicates a highly dependable drive architecture designed to minimize uncorrectable read errors and support stable long-term deployment.
1. The dual-port SAS interface fits seamlessly into mission-critical storage arrays, delivering proven enterprise interoperability, path redundancy, and simpler uptime-focused operations.
2. Its strong sequential throughput speeds up backup, restore, replication, and large dataset scan jobs, helping shorten maintenance windows and analytics runtimes.
3. The high random-read capability keeps virtualized servers, OLTP databases, and read-heavy application tiers responsive even under heavy concurrent access.
4. Samsung V-NAND TLC paired with enterprise-class write endurance makes it a solid fit for mixed-use workloads that need both cost-efficient capacity and dependable lifecycle planning.
5. The very low typical latency helps reduce application response time and improves SLA consistency for transaction processing, metadata lookups, and latency-sensitive infrastructure services.
Within this SAS enterprise SSD family, the nearest lower capacity to 1.6TB is 800GB, while the next higher step is 3.2TB. The 1.6TB point is the practical sweet spot: it offers noticeably more headroom than 800GB for OS images, logs, hot datasets, and steady VM growth, while avoiding the higher acquisition cost of 3.2TB when top-end capacity is not yet required. Because sequential throughput and random IOPS remain broadly similar across these capacities, 1.6TB delivers the best balance of usable space, cost efficiency, and enterprise performance for mid-sized virtualization clusters or database nodes supporting about 40 to 60 business workloads.
Q: Is MZILT1T6HBJRAD3 suitable for a write-heavy database server?
A: Yes. With 3 DWPD endurance, 8,760 TBW, SAS 12G interface, and 95 µs typical latency, MZILT1T6HBJRAD3 is well suited for write-intensive database, logging, and transactional 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 full drive writes per day. For a 1.6TB SSD, that equals about 4.8TB of writes daily, matching its enterprise endurance profile.
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, reducing corruption risk and improving reliability for enterprise storage environments.
Q: What RAID level is recommended for this SSD?
A: RAID recommendation depends on the application. RAID 10 is typically preferred for high-performance databases, while RAID 5 or RAID 6 may suit capacity-focused workloads needing fault tolerance.