The Toshiba MK4034GSX (part number HDD2D39) is a 2.5-inch SATA/150 internal hard drive with 40 GB capacity, 5400 RPM spindle speed, and 8 MB buffer. This drive interfaces via SATA I (150 Mbps) and is designed for compact systems including laptops, portable storage enclosures, and space-constrained servers requiring modest capacity. The 2.5-inch form factor and low power consumption make it suitable for mobile workstations and legacy equipment refresh scenarios. Common applications include archival storage, non-critical data retention, and systems where mechanical reliability and cost-effectiveness outweigh performance requirements.
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