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| Brand | Samsung |
|---|---|
| Model | PM1645a |
| Capacity | 6.4 TB |
| Usage Class | Mixed Use |
| Host Interface | SAS 12Gb/s |
|---|---|
| Total Interface Bandwidth | 12 Gb/s |
| Form Factor | 2.5 |
|---|
| NAND Flash | Samsung V-NAND 3D TLC |
|---|---|
| Drive Writes Per Day | 3 |
| Total Bytes Written | 35040 TBW |
| Sequential Read | 2300 MB/s |
|---|---|
| Sequential Write | 2000 MB/s |
| Random Read IOPS | 440000 |
| Random Write IOPS | 90000 |
| Average Latency | 100 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZILS6T4HCHP-00007 |
|---|
Compared with the previous-generation MZILS6T4HCHP-00007, the Samsung PM1645a MZILT6T4HALA-000H3 moves to a newer V-NAND 3D TLC platform and delivers stronger enterprise SAS performance with up to 2300/2000 MB/s and 440K/90K IOPS, improving responsiveness for mixed OLTP and virtualization workloads. With 6.4 TB capacity, 3 DWPD, and 35,040 TBW, it offers a better balance of endurance density and throughput than earlier 12Gb/s SAS drives, making it a stronger fit for write-intensive database tiers and mission-critical storage arrays.
With an endurance rating of 35,040 TBW and 3 DWPD, the MZILT6T4HALA-000H3 is built to handle sustained enterprise write workloads with substantial headroom. In typical real-world use such as a system disk, boot drive, or mixed read/write server workload, this level of endurance means the drive can operate for many years without endurance becoming a practical concern. Its enterprise reliability is further strengthened by power-loss protection (PLP), which helps preserve in-flight data and protects metadata integrity if power is interrupted unexpectedly. The UBER specification of 1.0E-17 indicates an extremely low unrecoverable bit error rate, giving purchasers added confidence in data integrity for business-critical storage environments.
1. The SAS 12Gb/s interface provides dual-port enterprise connectivity and proven high-availability integration, making this drive a strong fit for mission-critical storage arrays and server backplanes.
2. With sequential read performance of 2300 MB/s, the drive accelerates large-block workloads such as backup restore, database scans, and analytics data streaming.
3. Delivering 440,000 K IOPS in random reads, it helps virtualized platforms and OLTP databases sustain fast response under heavy multi-user access.
4. Rated for 3 DWPD, the SSD is built to handle sustained write-intensive enterprise workloads over its service life, reducing replacement risk in always-on environments.
5. Built on Samsung V-NAND 3D TLC and tuned for a typical latency of 100 µs, it balances flash density with consistently quick access times for predictable application performance.
Lower capacity reference: 3.2 TB Higher capacity reference: 12.8 TB For MPN MZILT6T4HALA-000H3, the 6.4 TB point is the practical sweet spot in the family. Compared with the 3.2 TB model, it provides noticeably more room for VM expansion, logs, snapshots, and spare capacity while keeping the expected enterprise-grade sequential and random I/O profile broadly similar. Compared with the 12.8 TB option, it typically offers a better balance between acquisition cost and usable capacity, without overcommitting budget to unused space. It is especially well suited to medium-scale deployments, such as a 12-node virtualization cluster or a compact transactional database pool.
Q: Is MZILT6T4HALA-000H3 suitable for a write-heavy database server?
A: Yes. With 3 DWPD, 35,040 TBW, 12Gb/s SAS, and 100 µs typical latency, this 6.4 TB enterprise SSD is well suited for write-intensive database and transactional workloads.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: It is rated for 3 full drive writes per day. For a 6.4 TB SSD, that equals 19.2 TB daily and matches the 35,040 TBW specification over a typical 5-year warranty.
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 data integrity in enterprise servers and storage systems.
Q: What RAID level is recommended for this SSD?
A: For write-heavy, performance-sensitive deployments, RAID 10 is generally recommended because it provides strong redundancy, fast rebuilds, and lower write penalty. RAID 5 or 6 is better when usable capacity matters more.