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| Brand | Intel |
|---|---|
| Model | D3-S4520 Series |
| Capacity | 240GB |
| Usage Class | Enterprise Data Center / Mixed Use |
| Host Interface | SATA 6Gb/s |
|---|---|
| Total Interface Bandwidth | 6 Gb/s |
| Form Factor | M.2 22 x 80mm |
|---|
| NAND Flash | Intel 144-layer 3D TLC |
|---|---|
| Drive Writes Per Day | 1 |
| Total Bytes Written | 1100 TBW |
| Sequential Read | 550 MB/s |
|---|---|
| Sequential Write | 280 MB/s |
| Random Read IOPS | 80000 |
| Random Write IOPS | 19000 |
| Average Latency | 36 μs |
| Mean Time Between Failures | 2.0 Million Hours |
|---|---|
| Uncorrectable Bit Error Rate | 1.0×10⁻¹⁷ |
| Power Loss Protection | Yes |
| MPN | SSDSCKKB240G8 |
|---|
The Intel D3-S4520 240GB (SSDSCKKB240GZR) is a strong upgrade over SSDSCKKB240G8, moving to Intel 144-layer 3D TLC to deliver a more modern endurance profile with 1 DWPD and 1100 TBW while sustaining full SATA performance at up to 550/280 MB/s. For read-centric boot, caching, and edge-server workloads that still require consistent write tolerance, it offers better long-term serviceability and value than the previous generation in the same 240GB SATA 6Gb/s form factor.
With an endurance rating of 1100 TBW and 1 DWPD, the SSDSCKKB240GZR is designed to handle writing its full 240GB capacity once per day across its warranty usage profile, which is more than sufficient for typical OS, boot, logging, and general enterprise read-intensive workloads. In practical terms, under normal system-drive conditions, this level of endurance supports many years of stable operation and gives buyers strong confidence that the drive will comfortably meet long-term daily use requirements. For enterprise reliability, the drive includes Power Loss Protection (PLP), which helps preserve in-flight data and protects mapping tables during unexpected power interruptions, reducing the risk of corruption and unplanned recovery events. Its UBER rating of 1.0E-17, combined with a 2 million-hour MTBF, indicates a very low uncorrectable bit error rate and a robust reliability design, making it a dependable choice for business-critical storage environments.
1. The SATA 6Gb/s interface, paired with strong sequential read performance, enables straightforward integration into mainstream enterprise servers while accelerating OS boot, file streaming, and large-volume data access.
2. High random read capability helps databases, virtual desktop environments, and web applications respond faster under heavy concurrent workloads, improving user experience and system efficiency.
3. A 1 DWPD endurance rating makes the drive well suited for mixed-use enterprise deployments that require dependable daily rewrites without overprovisioning for unnecessary write tolerance.
4. Intel 144-layer 3D TLC NAND provides a balanced combination of capacity, cost efficiency, and reliability, making it a practical choice for scale-out data center storage.
5. Ultra-low typical latency supports faster transaction handling and more predictable QoS, which is critical for latency-sensitive enterprise applications such as virtualization and online transaction processing.
Lower-capacity reference: 120GB Higher-capacity reference: 480GB Capacity positioning analysis: In this product family, the 240GB model sits in the practical sweet spot. Compared with the 120GB version, it provides much better headroom for OS images, logs, patches, and application growth, reducing the risk of early capacity pressure in always-on enterprise environments. Compared with the 480GB version, it keeps acquisition cost and replacement budgeting more controlled while still delivering essentially the same class of sequential and random performance. It is best suited for small-to-medium deployments, such as boot and application storage for roughly 25 to 40 virtualization hosts or edge servers.
Q: Is SSDSCKKB240GZR suitable for a write-heavy database server?
A: Yes, it can support write-intensive database workloads. With 1 DWPD, 1100 TBW, Intel 144-layer 3D TLC NAND, and 36 µs typical latency, it is suitable for sustained enterprise write activity.
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 240GB drive write per day across its warranty period, consistent with its 1100 TB total endurance rating.
Q: Does it include power loss protection (PLP) and why is that critical?
A: Yes, it includes power loss protection. PLP is critical in enterprise environments because it helps preserve in-flight data and metadata during sudden outages, reducing corruption risk and improving system reliability.
Q: What RAID level is recommended for this SSD?
A: The recommended RAID level depends on your priority. RAID 1 is ideal for redundancy, RAID 10 for performance and resilience, and RAID 5 or 6 for balanced capacity efficiency.