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Short answer: Four A much more precise answer: The IDE standard allows for two devices to share a single IDE channel. The most common configuration is for there to be two IDE channels on the motherboard, allowing for a total of four devices. It is possible however, to add more IDE channels, usually in the form of PCI add-on IDE controller cards and have literally dozens of IDE devices in a single computer system.
Primary IDE Channel , Master Device Primary IDE Channel , Slave Device Secondary IDE Channel , Master Device Secondary IDE Channel , Slave Device
The best IDE channel to connect on a hard drive is the Primary IDE channel, Also known as IDE 1 in dell computers
El Torito
SATA and IDE are operated on different buses, with different controllers. A SATA drive is not considered a "master" or a "slave"; it has a channel all to itself. If the IDE drive is by itself on the controller, it should be set as Master.
3F0 - 3F7Primary floppy disk drive controller. Primary IDE controller (slave drive) (3F6-3F7h)
Parallel ATA (sometimes called PATA) is synonymous with IDE or EIDE (Integrated Drive Electronics or Enhance Integrated Drive Electronics). IDE was the first technology to include the controller and hard drive in the same housing; previously with SCSI, MFM and RLL drives, the drive and the controller were separate.
The Primary IDE Channel component provides the IDEport driver in the atapi.sys file.The IDE port driver is part of the IDE driver model in Windows 2000
it has 2 IDE controller
The secondary IDE channel is used to reference the other IDE channel apart from the primary one on a computer mainboard. While the primary IDE channel usually takes the system/first hard disk of the system, the secondary channel usually takes optical drives or the second hard drive.
If replacing the optical drive on a primary IDE controller, it is important it is compatible with the CD Rom drive. The IDE data cable must be connected and you must have the power cord plugged in.