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| Brand | Samsung |
|---|---|
| Model | 870 QVO |
| Capacity | 4 TB |
| Usage Class | Consumer/Client |
| Host Interface | SATA 3.0 6Gb/s |
|---|---|
| Total Interface Bandwidth | 6 Gb/s |
| Form Factor | 2.5 inch 7mm |
|---|
| NAND Flash | Samsung V5 (9xL) QLC |
|---|---|
| Drive Writes Per Day | 0.3 |
| Total Bytes Written | 1440 TBW |
| Sequential Read | 560 MB/s |
|---|---|
| Sequential Write | 530 MB/s |
| Random Read IOPS | 98000 |
| Random Write IOPS | 88000 |
| Average Latency | 150 μs |
| Mean Time Between Failures | 1.5 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | No |
| MPN | MZ-76Q4T0B/AM |
|---|
The Samsung 870 QVO 4 TB (MZ-77Q4T0B/AM) is a strong fit for capacity-first SATA builds, combining Samsung V5 (9xL) QLC NAND with near-interface-limit performance of 560/530 MB/s and 98,000/88,000 IOPS while retaining a solid 1,440 TBW rating. Compared with MZ-76Q4T0B/AM, it improves sequential throughput from 550/520 to 560/530 MB/s and brings a newer NAND generation, making it the cleaner drop-in upgrade for read-heavy media libraries, backup sets, and bulk workstation storage.
With an endurance rating of 1,440 TBW and 0.3 DWPD, the MZ-77Q4T0B/AM can sustain about 788 GB of writes per day over its 5-year design endurance window, which is well above the write volume of most client, office, and boot-drive workloads. In practical terms, for a typical system drive or general business PC, this level of endurance supports many years of stable operation without write wear being a likely limiting factor. For reliability, the specified UBER of 1.0E-15 means the drive is designed for a very low rate of unrecoverable bit errors, helping protect 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-transactional workloads, applications with frequent sudden power interruptions or in-flight write-critical data should use appropriate system-level safeguards such as UPS backup or software journaling.
1. The SATA 3.0 6Gb/s interface paired with 560 MB/s sequential read performance provides a drop-in upgrade for legacy enterprise servers and storage arrays, accelerating large file retrieval without requiring a platform overhaul.
2. With 98,000 K IOPS random read capability, this SSD helps virtualized workloads, boot storms, and metadata-heavy applications respond faster under highly concurrent access patterns.
3. A 0.3 DWPD endurance rating makes it a cost-efficient fit for read-centric enterprise use cases such as content repositories, analytics datasets, and scale-out object storage where write pressure is moderate.
4. Samsung V5 (9xL) QLC NAND enables higher capacity density at lower cost, giving data centers a practical way to expand warm-data and nearline flash tiers within tight budget constraints.
5. The 150 µs typical latency supports more predictable application response times, reducing storage-induced delays for user-facing services and mixed enterprise workloads.
Lower capacity reference: 2 TB (MZ-77Q2T0B/AM) Higher capacity reference: 8 TB (MZ-77Q8T0B/AM) Capacity positioning analysis: In the 870 QVO family, the 4 TB model sits at the sweet spot for capacity planning. Compared with the 2 TB version, it gives much more headroom for dataset growth, longer refresh cycles, and denser consolidation without changing the familiar performance profile. Compared with the 8 TB model, it delivers a better balance of acquisition cost, usable capacity, and risk concentration per drive. This makes 4 TB especially well suited for mid-scale virtualization clusters, VDI image pools, edge data nodes, and read-heavy application storage.
Q: Is MZ-77Q4T0B/AM suitable for a write-heavy database server?
A: No. This 4TB QLC SATA SSD is rated at 0.3 DWPD and 1440 TBW, so it is better suited for read-focused, light-to-moderate write workloads rather than write-heavy database servers.
Q: How many full drive writes per day can it actually endure over its warranty period?
A: It is specified for 0.3 DWPD, meaning about 0.3 full drive writes per day during the warranty period. For a 4TB drive, that equals roughly 1.2TB of writes daily.
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 server and database environments because it helps prevent in-flight data loss and reduces metadata or filesystem corruption risks.
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 performance consistency. RAID 5 is less ideal for write-intensive workloads due to parity write overhead.