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The IBM WD400BB is a 3.5-inch internal hard disk drive with a 40 GB storage capacity. Built by Western Digital as part of IBM’s desktop storage line, it uses a PATA/IDE interface for compatibility with legacy desktops and servers. This drive is suitable for system upgrades, replacements, or use in older hardware where IDE storage is required. Reliable spinning-disk performance makes it useful for basic storage, backups, or retro computing projects.
 
C9F2 Non Data Device