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| Brand | Samsung |
|---|---|
| Model | PM9A3 |
| Capacity | 1.92 TB |
| Usage Class | Enterprise/Read-Intensive |
| Host Interface | PCIe 4.0 x4, NVMe |
|---|---|
| Total Interface Bandwidth | 64 Gb/s |
| Form Factor | E1.S 9.5mm |
|---|
| NAND Flash | Samsung V6 (128L) TLC |
|---|---|
| Drive Writes Per Day | 1 |
| Total Bytes Written | 3504 TBW |
| Sequential Read | 6800 MB/s |
|---|---|
| Sequential Write | 4000 MB/s |
| Random Read IOPS | 1000000 |
| Random Write IOPS | 180000 |
| Average Latency | 80 μs |
| Mean Time Between Failures | 2 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | MZ1L21T9HCLS-00007 |
|---|
Compared with the earlier MZ1L21T9HCLS-00007, the MZ1L21T9HCLS-00A07 PM9A3 leverages a PCIe 4.0 x4 NVMe interface and Samsung V6 128-layer TLC NAND to deliver up to 6,800 MB/s read, 4,000 MB/s write, and 1,000,000 random read IOPS, giving it a clear generational advantage in bandwidth and transaction latency for modern servers. At 1.92 TB with 1 DWPD and 3,504 TBW, this SKU is a strong fit for read-heavy virtualization, scale-out web infrastructure, and mixed enterprise boot/data tiers where higher per-drive performance than prior-generation PCIe SSDs is needed without moving to a higher-endurance cost point.
With an endurance rating of 3,504 TBW and 1 DWPD, the MZ1L21T9HCLS-00A07 is designed to handle writing its full capacity once per day throughout its rated service life, which is more than sufficient for typical boot, application, virtualization, and mainstream server workloads. In practical terms, under normal system-disk or read-heavy enterprise usage, this level of endurance provides long-term peace of mind and can comfortably support many years of stable operation without endurance becoming a concern. For enterprise reliability, built-in Power Loss Protection (PLP) helps safeguard in-flight data and metadata during an unexpected power interruption, reducing the risk of corruption and improving system recovery confidence. Its UBER of 1.0E-17 indicates an extremely low uncorrectable bit error rate, and together with the 2 million hour MTBF, it reflects a drive class engineered for dependable data integrity and consistent datacenter operation.
1. The PCIe 4.0 x4 NVMe interface gives this drive the bandwidth and command efficiency to keep virtualization clusters, analytics nodes, and GPU servers fed without storage becoming the bottleneck.
2. Its 6800 MB/s sequential read performance sharply reduces large-file access time, accelerating database snapshots, media streaming, and AI model loading in enterprise environments.
3. With 1,000,000 K random read IOPS, it sustains exceptionally high small-block transaction throughput, making it ideal for latency-sensitive OLTP, VDI, and metadata-heavy workloads.
4. A 1 DWPD endurance rating enables predictable full-drive rewrites over the service life, giving enterprises a solid balance of write durability, usable capacity, and lower total cost of ownership.
5. Built on Samsung V6 (128L) TLC NAND and delivering a typical latency of 80 µs, it combines mature flash reliability with fast response times that help applications stay consistent under mixed production workloads.
Lower capacity reference: 960 GB Higher capacity reference: 3.84 TB In this series, 1.92 TB is the practical sweet spot. Compared with 960 GB, it gives noticeably more headroom for OS images, application growth, logs, and overprovisioning, reducing capacity pressure in daily enterprise use. Compared with 3.84 TB, it usually delivers the best balance of acquisition cost, usable space, and mainstream enterprise performance, since sequential throughput and random IOPS remain broadly similar across these capacities. It is especially well suited for mid-scale virtualization clusters, such as hosting boot and application volumes for about 40 to 60 business VMs.
Q: Is MZ1L21T9HCLS-00A07 suitable for a write-heavy database server?
A: It can support mixed-use database workloads, but with 1 DWPD and 3504 TBW, it is better suited to moderate write intensity rather than very write-heavy enterprise database 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 1.92 TB drive write per day throughout its warranty period within the specified endurance limits.
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, which is critical for transactional systems, databases, and enterprise data integrity.
Q: What RAID level is recommended for this SSD?
A: For most server deployments, RAID 1 or RAID 10 is recommended to balance performance, redundancy, and fast recovery. RAID 5 may be used when capacity efficiency is a higher priority.