I have read some where it is possible to install four IDE devices on a single channel. Mother Board (Device 1) HardDisk (Device 2) HardDisk (Device 3) Optical Drive (Device 4) but the fourth device is read only. Is this true/doable?
Short answer: NO Long answer: The IDE standard only allows for two settings per channel - "master" & "slave" ("cable select" just makes this automatic). You can run a single drive in either mode but the second drive has to have the other setting. There is no setting for a third device. (The motherboard does not count as a device.) Full explanation: Here