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| Brand | Samsung |
|---|---|
| Model | 990 PRO |
| Capacity | 4TB |
| Usage Class | Consumer |
| Host Interface | PCIe Gen 4.0 x4, NVMe 2.0 |
|---|---|
| Total Interface Bandwidth | 16 Gb/s |
| Form Factor | M.2 (2280) |
|---|
| NAND Flash | Samsung V-NAND 3nd Generation TLC |
|---|---|
| Drive Writes Per Day | 0.33 |
| 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 | 50 μs |
| Mean Time Between Failures | 1.5 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | No |
| MPN | MZ-V8P2T0BW |
|---|
Samsung 990 PRO 4TB (MZ-V9P4T0CW) is the stronger Gen4 NVMe upgrade over MZ-V8P2T0BW, combining a larger 4TB capacity with up to 7450/6900 MB/s sequential throughput, 1,600,000/1,550,000 IOPS, and 2400 TBW endurance for substantially more workspace and write-life headroom. For engineers building high-performance workstations or local AI/content pipelines, its PCIe 4.0 x4, NVMe 2.0 design and Samsung V-NAND TLC architecture deliver a better balance of sustained performance, latency, and endurance than the previous-generation model.
With an endurance rating of 2400 TBW, this SSD can sustain approximately 657 GB of host writes per day over 10 years, which is well above the write volume of a typical OS, office, and general-purpose workstation drive. In practical terms, for boot-drive and mainstream client workloads, this level of endurance provides a very comfortable margin and should support many years of stable use without endurance-related concern. Its UBER rating of 1.0E-15 indicates a very low probability of unrecoverable read errors, supporting dependable data integrity for normal professional and commercial deployments. This model does not include power-loss protection (PLP), so while it is well suited for standard desktops and systems protected by proper shutdown procedures or UPS backup, it is not the ideal choice for write-critical enterprise environments where sudden power interruption protection is required.
1. The PCIe Gen4 x4 NVMe design provides ample host-side bandwidth, helping enterprise servers, hyperconverged nodes, and GPU systems avoid storage bus contention under heavy parallel workloads.
2. Its strong sequential read capability shortens large dataset staging, backup restore, and analytics scan times, making it well suited for read-intensive content delivery and data lake environments.
3. The high random read performance accelerates metadata lookups, VM boot storms, and high-concurrency database access, improving responsiveness for mixed enterprise applications.
4. This endurance profile is best aligned with read-centric enterprise deployments such as scale-out storage, AI inference, and cloud content platforms where capacity and speed matter more than sustained daily overwrites.
5. Samsung V-NAND TLC paired with very low typical latency enables consistent flash response and efficient cost per terabyte, supporting dense deployment in latency-sensitive virtualized and transactional environments.
Lower capacity reference: 2TB Higher capacity reference: 8TB At 4TB, this model sits in the sweet spot of the series. Compared with 2TB, it gives much better headroom for dataset growth, overprovisioning, snapshots, and mixed application workloads without materially changing the expected sequential throughput or random IOPS profile. Compared with 8TB, it avoids the steeper capacity premium and usually delivers the best balance between acquisition cost, usable endurance, and practical performance. It is well suited for mid-scale deployment, such as hosting OS and application volumes for about 60 to 80 virtual desktops or a compact analytics node.
Q: Is MZ-V9P4T0CW suitable for a write-heavy database server?
A: Not ideally. With 0.33 DWPD and 2400 TBW, MZ-V9P4T0CW is better suited for client, workstation, or read-intensive workloads rather 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 0.33 full drive writes per day. For a 4TB SSD, that equals about 1.32TB of writes daily across 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 important in servers because it helps prevent in-flight data loss and metadata corruption during unexpected power interruptions.
Q: What RAID level is recommended for this SSD?
A: For this SSD, RAID 1 or RAID 10 is generally recommended for better redundancy and stable performance. RAID 0 is not advised for important data or business-critical workloads.