IBM 146GB 15,000 RPM SAS 6Gb/s Enterprise Hard Drive

Model: ST9146852SS | IBM FRU: 42D0678 | P/Ns: 42D0677, 42D0681 | 146GB Capacity | 15K RPM

The IBM 42D0678 is a mission-critical, high-performance enterprise drive based on the Seagate Savvio 15K.2 platform. Engineered for the IBM System x and BladeCenter ecosystems, this drive is a "Tier-1" storage solution designed for environments where every millisecond counts. By combining a 15,000 RPM spindle speed with a 6Gb/s SAS interface, it delivers the high IOPS and low latency necessary for heavy transactional workloads and high-density server configurations.

📊 Technical Specifications

• Capacity: 💾 146 GB

• Interface: ⚡ SAS 6Gb/s (Dual Port)

• Spindle Speed: 🏎️ 15,000 RPM

• Cache: 🧠 16 MB

• Form Factor: 📏 2.5-inch SFF (15mm "Small Form Factor")

• Data Transfer Rate: 🏎️ Up to 600 MB/s (External)

• Average Latency: ⏱️ 2.0 ms

• MTBF: 🕒 1.6 Million Hours

✅ Product Overview

• Extreme Transactional Performance: The 15K RPM speed provides the fastest mechanical access times available, making it ideal for "hot" data—information that is frequently accessed and requires immediate response.

• IBM System x Optimization: As an official IBM FRU (Field Replaceable Unit), this drive features specialized firmware to ensure 100% compatibility with ServeRAID controllers. It supports advanced IBM features like Predictive Failure Analysis (PFA) and integrated health monitoring.

• Green Enterprise Design: Despite its high speed, the Savvio 15K.2 architecture is more power-efficient than legacy 3.5-inch 15K drives, allowing for higher system performance within the same power and cooling envelope.

• Hot-Swap Reliability: Built for 24/7 continuous operation, this drive is designed for hot-swap backplanes, enabling IT administrators to replace or upgrade storage without taking the server offline.

📦 Compatibility & Use Case

• Target Systems: Optimized for IBM System x servers (x3250 M3/M4, x3550 M2/M3, x3650 M2/M3) and IBM BladeCenter (HS12, HS22, HS22V).

• Note on Trays: This drive typically comes pre-mounted in the IBM 2.5-inch hot-swap caddy. Always verify that the tray style matches your specific IBM server generation (e.g., the traditional Gen 2 tray vs. later slim designs).

• Ideal Workloads: Online Transaction Processing (OLTP), database indexing, mission-critical OS boot volumes, and localized high-speed caching.