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| Brand | Samsung |
|---|---|
| Model | PM9A3 |
| Capacity | 1.92 TB |
| Usage Class | Enterprise / Data Center Read Intensive |
| Host Interface | PCIe Gen4 x4, NVMe 1.4 |
|---|---|
| Total Interface Bandwidth | 64 Gb/s |
| Form Factor | 2.5 |
|---|
| NAND Flash | Samsung V6 (128-layer) 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 | MZQLB1T9HAJR-00007 |
|---|
The Samsung PM9A3 1.92TB (MZQL21T9HCJR-00B7C) is a strong upgrade over the previous-generation MZQLB1T9HAJR-00007, combining PCIe Gen4 x4 and Samsung 128-layer V6 TLC to deliver up to 6,800 MB/s sequential read and 1,000,000 random read IOPS for markedly higher host-side throughput and faster response in read-intensive server workloads. With 1 DWPD and 3,504 TBW, it is especially well suited for virtualization clusters, scale-out storage, and cloud boot or content-serving tiers that need a better balance of performance density, endurance, and platform longevity than the prior generation.
With an endurance rating of 3,504 TBW and 1 DWPD, this SSD is designed to handle writing its full 1.92 TB capacity every day over a typical enterprise service life, which is well above the write volume seen in most OS boot, application, and read-focused server workloads. In practical use, that means it offers substantial endurance margin for system-disk and mainstream enterprise deployment, helping reduce wear-related replacement concerns over long-term operation. Its enterprise-grade power loss protection (PLP) helps preserve in-flight data and metadata during an unexpected power interruption, reducing the risk of corruption and improving overall data integrity. The UBER specification of 1.0E-17 indicates an extremely low uncorrectable bit error rate, giving procurement teams added confidence in data reliability for business-critical environments.
1. The PCIe Gen4 x4, NVMe 1.4 platform provides enough host-side bandwidth to keep storage from becoming the choke point in database scans, VM boot storms, and large-scale data ingestion.
2. Its top-tier sequential read performance accelerates AI model loading, backup recovery, and analytics jobs that stream massive datasets from storage.
3. The million-class random read capability sustains heavy parallel access with minimal slowdown, making it a strong fit for OLTP databases, virtualized infrastructure, and metadata-intensive cloud services.
4. A 1 DWPD endurance rating matches mainstream enterprise write profiles, giving operators confidence in daily overwrite-heavy environments without overpaying for unnecessary endurance headroom.
5. Samsung V6 128-layer TLC NAND, paired with microsecond-class latency, delivers a practical balance of capacity, efficiency, and responsive QoS for latency-sensitive business applications.
Lower capacity reference: 960 GB Higher capacity reference: 3.84 TB The 1.92 TB model sits at the sweet spot of this SSD family. Compared with the 960 GB version, it gives meaningfully more headroom for OS images, application growth, logs, and overprovisioning without changing the expected enterprise-class sequential throughput or random IOPS profile. Compared with the 3.84 TB option, it usually delivers a better balance of acquisition cost, usable capacity, and fleet-level efficiency. It is especially well suited for mid-scale virtualization clusters, such as hosting boot and application volumes for about 40 to 60 general-purpose virtual machines.
Q: Is MZQL21T9HCJR-00B7C suitable for a write-heavy database server?
A: It can support moderate write-intensive database workloads, but with 1 DWPD and 3504 TBW, it is better suited for mixed-use enterprise environments rather than very heavy sustained write databases.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: This model is rated for 1 DWPD, meaning it can handle one full 1.92 TB drive write per day across 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 unexpected outages, which is critical for maintaining data integrity and reducing corruption risk in enterprise systems.
Q: What RAID level is recommended for this SSD?
A: RAID 10 is typically recommended for database and virtualization workloads requiring both performance and redundancy. For capacity-focused deployments, RAID 5 or RAID 6 may also be considered, depending on rebuild tolerance.