74G8696 IBM 270MB 4500RPM ATA/IDE 128KB Cache 3.5-inch Internal Hard Drive
Hard disk drive interface - Wikipedia
Hard disk drive - Wikipedia
Hard disk drive - Wikipedia
Refurbished: Western Digital Blue WD800JB 80GB 7200 RPM 8MB Cache IDE Ultra ATA100 / ATA-6 3.5" Hard Drive Bare Drive Desktop Internal Hard Drives - Newegg.com