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| Brand | Samsung |
|---|---|
| Model | 990 PRO |
| Capacity | 4 TB |
| Usage Class | Client / Consumer |
| Host Interface | PCIe Gen4 x4 |
|---|---|
| Total Interface Bandwidth | 64 Gb/s |
| Form Factor | M.2 (2280) |
|---|
| NAND Flash | Samsung V-NAND 3-bit MLC |
|---|---|
| Drive Writes Per Day | 0.3 |
| Total Bytes Written | 2400 TBW |
| Sequential Read | 7450 MB/s |
|---|---|
| Sequential Write | 6900 MB/s |
| Random Read IOPS | 1600000 |
| Random Write IOPS | 1550000 |
| Average Latency | 55 μs |
| Mean Time Between Failures | 1.5 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | No |
| MPN | MZ-V8P2T0CW |
|---|
The Samsung 990 PRO 4TB (MZ-V9P4T0GW) is the clear upgrade over the previous MZ-V8P2T0CW, delivering higher PCIe Gen4 performance with up to 7,450/6,900 MB/s sequential read/write, up to 1.6M/1.55M random read/write IOPS, and doubling endurance to 2,400 TBW with a 4 TB footprint. Compared with the prior generation, it offers a materially stronger mix of capacity, sustained write throughput, and high-queue-depth responsiveness, making it the better fit for large game libraries, content creation scratch space, and workstation-class boot drives that need both speed and lifecycle headroom.
With an endurance rating of 2,400 TBW, this SSD can sustain a total of 2.4 petabytes of writes before reaching its rated wear limit, which is more than sufficient for typical client and workstation workloads. In practical terms, for use as an OS, application, or general business data drive, this level of endurance supports many years of stable service under normal daily write volumes, and the 0.3 DWPD rating further confirms suitability for sustained everyday operation. In reliability terms, the specified UBER of 1.0E-15 means the drive is designed for a very low uncorrectable bit error rate, helping ensure strong data integrity during normal read operations. This model does not include power-loss protection (PLP), so while it is well suited for standard desktop and non-power-critical environments, systems requiring protection against in-flight data loss during unexpected outages should pair it with stable power infrastructure such as UPS support.
1. The PCIe Gen4 x4 interface, paired with top-tier sequential read performance, accelerates large database restores, VM boot storms, and analytics dataset loading by removing storage as a throughput bottleneck.
2. Its random read capability is built for heavily virtualized and metadata-intensive environments, sustaining fast response under massive parallel access from OLTP, VDI, and scale-out application clusters.
3. The endurance profile is well suited to read-centric enterprise deployments such as content delivery, reference data stores, and AI model serving, where capacity and speed matter more than constant heavy overwriting.
4. Samsung V-NAND 3-bit MLC provides a strong balance of density, power efficiency, and lifecycle management, helping enterprises scale flash capacity without giving up operational consistency.
5. The typical latency supports quicker transaction acknowledgment and tighter QoS behavior, which is especially valuable for latency-sensitive applications that must keep tail response times under control.
Lower capacity reference: 2 TB, MPN MZ-V9P2T0GW Higher capacity reference: No larger-capacity model is currently offered in the exact MZ-V9P series; 4 TB is the top-end point in this family. Capacity positioning analysis: In the MZ-V9P family, 4 TB is the practical sweet spot. Compared with the 2 TB model, it gives much better headroom for mixed workloads, denser VM placement, and longer growth runway before capacity becomes a constraint. At the same time, it avoids the heavier budget impact that usually comes with stepping into a higher-capacity class in adjacent product families, while keeping essentially the same sequential and random performance profile. This makes 4 TB especially well suited for a mid-sized virtualization node hosting about 40 to 60 light-to-medium workload instances.
Q: Is MZ-V9P4T0GW suitable for a write-heavy database server?
A: Not ideally. With 0.3 DWPD and 2400 TBW, MZ-V9P4T0GW is better suited for read-intensive or mixed workloads than sustained write-heavy database server environments.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: It is rated for 0.3 drive writes per day, meaning about 1.2 TB of writes daily on the 4 TB model over the standard warranty period.
Q: Does it include power loss protection (PLP) and why is that critical?
A: No, it does not include PLP. Power loss protection is critical in enterprise systems because it helps prevent in-flight data loss and metadata corruption during sudden outages.
Q: What RAID level is recommended for this SSD?
A: For this SSD, RAID 1 or RAID 10 is typically recommended for better redundancy and performance. RAID 5 may work, but parity writes can increase write amplification.