The WD400BB-75AUA1 is a Western Digital Caviar SE 40GB hard drive featuring a 3.5-inch form factor and 7200 RPM spindle speed for moderate performance in desktop and entry-level server environments. The drive connects via ATA-100 (PATA) interface with a 2MB cache buffer, supporting data transfer rates up to 100 MB/s. Typical applications include legacy system storage, archival purposes, and boot drives in older workstations where SATA connectivity is unavailable. Note that this drive uses parallel ATA technology and requires appropriate ribbon cables and power connectors; it is not compatible with modern SATA-based systems without an adapter. All units tested and guaranteed; available via quote.
