| Integrated Device Electronics (IDE) is the most | | | | physically kept onto the controller. Then the |
| popular and widely utilized interface of hard disk | | | | controller was placed at the hard drive’s |
| drive. The name IDE depicts the electronic | | | | bottom and the whole controller assembly and |
| controller and technology integrated into the hard | | | | the hard disk was moved to regular drive bay. |
| disk drive. IDE interface has been extended and | | | | Cable was used to maintain the connection with |
| enhanced IDE (EIDE) technology has been | | | | the system bus. The cable was connected to |
| introduced whose data transfer speed is twice in | | | | system bus slot directly or with the interfacing |
| comparison to the IDE drives. IDE hard drives | | | | card. The card was attached to the bus slot of |
| were the pioneers in which the logical controller | | | | the system. The hard disk drives were directly |
| was it integrated onto the hard drive. This new | | | | attached to the industry standard architecture |
| change in the hard disk drives resolved most of | | | | system bus. ISA (Industry standard architecture) |
| the problems that were related to the hard drives | | | | bus’s slow speed was an issue that needed |
| like complexity and indigent signal integrity. The | | | | to be resolved along with improvement in the |
| first drives in which the controllers were | | | | performance and system of the hard drive. |
| integrated did not use technically utilize the IDE | | | | Therefore the controller cards interface cards also |
| interface as it is now used in the IDE hard drives. | | | | called as “interface cards” were developed |
| Those 3.5 inch hard drives were directly mounted | | | | to get high speed PCI bus and VESA (Video |
| to the “controller-card” and called as hard | | | | Electronics Standards Association ) local bus. The |
| cards. The card was then plugged into Industry | | | | ATA/IDE interface is directly connected to the |
| Standard Architecture (ISA) slot. They were | | | | PC bus in the modern personal computer |
| mostly used by those consumers who needed to | | | | systems. |
| extend the storage capacity of their existing | | | | Manufacturers of chipset afterwards began to |
| precious systems. With the integration of | | | | integrate controllers of IDE into the chipsets. |
| controller and disk, the users can insert package | | | | Therefore the hard disk drives were directly |
| into their existing personal computer systems just | | | | attached to the motherboard rather than being |
| as they can add peripheral. During all this process | | | | connected to the controller card. With the help of |
| the existing controller and hard drive were not | | | | this change the interface’s integration was |
| affected. There were several problems with the | | | | complete. Interface of ATA/IDE is straight |
| hard-cards. The hard drives can not be mounted | | | | forward and simple in its basic fundamental |
| in slots as the modem or the video card. Physical | | | | operations and it also depicts its origins as |
| support for card extension was indigent as they | | | | expansion of ISA (Industry standard architecture) |
| had problems of vibrations because one screw | | | | system bus. Width of the connection between |
| was used to hold them in place. The hard card | | | | hard drive and the system is 16 bits. So in this |
| drives had problem of cooling and were too wide | | | | way data of 2 bytes is transferred at a time |
| and they used 2 bus slots as one of the bus slots | | | | between hard drive and the system. |
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