Difference between IDE SCSI and SATA interfaces

Characteristics	IDE	SATA	SCSI
Acronym For	(IDE) interface	Serial ATA	Small Computer System Interface
Developed in	1986	2003	developed in 1978 and publicly disclosed in 1981
Pins Used	40 Pins	7 Pins (3 grounds and 4 active data lines in two pairs)	50-pin, 68 pin, and 80-pin
Data Transfer Rate	16 MB/s originally later 33, 66, 100 and 133 MB/s	SATA 1.0–> 150 MB/s, SATA 2.0–>300 MB/s,SATA 3.0 –>600 MB/s	Ultra-640 SCSI: 640 MB/s or 5120 Mbit/s
Supported Devices per Cable	Two	One	Sixteen
Hot Swapping Support	No	Yes	Yes
Current Versions	Enhanced IDE(EIDE)	SATA 3.2	Ultra-640 SCSI

Key Terms Used:

Interface: It is the point of interaction between two separate components of computer system to exchange information. Interfaces can be of two types:

• Hardware Interface: This may exist in various components such as I/O devices, Disk Drives, Buses etc.
• Software Interface: This applies to wide range of different interfaces at different levels .e.g. interfacing of operating system with hardware, or interaction of operating system with application software etc.

Data Transfer Rate: It is the number of bits transferred per unit of time. The data transfer rate of a drive (throughput) covers both the internal rate (data Transfer between the disk surface and the controller on the drive) and the external rate (data Transfer between the controller on the drive and the host system)

Hot Swapping: It is the function of replacing computer components without shutting down the system. These devices are also called as plug and play devices.

The devices so connected are called hot pluggable (e.g. Pen Drive). The devices for which computer system must be powered down to add or remove them are called cold plugged devices (e.g. PS/2 Mouse or Keyboard).

Difference between IDE SCSI and SATA
Difference between IDE and SATA
Difference Between SCSI and SATA
Difference Between IDE and SCSI