IDE hard drive is what ah?

IDE hard disk interface is a way, SATA is now more of the serial.IDE is Integrated driver eletronics a hard disk Also known as parallel port interface, use the serial SATA hard disk is an IDE interface.
Hard disk sub-3 interface, IDE \ SATA \ SCSI
IDE data lines http://photo.baidu.com/ i? ct = 503316480 & z = 0 & tn = baiduimagedetail & word = IDE & in = 4104 & cl = 2 & cm = 1 & sc = 0 & lm =- 1 & pn = 60 & rn = 1 & di = 2277655844 & ln = 2000
IDE hard disk interface http://photo.baidu.com/i?ct = 503316480 & z = 0 & tn = baiduimagedetail & word = IDE% D3% B2% C5% CC & in = 31240 & cl = 2 & cm = 1 & sc = 0 & lm =- 1 & pn = 15 & rn = 1 & di = 520170180 & ln = 994