Hard disks interface to computers via components known as controllers or host adapters. (The former term is usually applied to ATA interfaces, whereas the latter applies to SCSI interfaces.) Until the mid-1990s, these devices were usually separate cards that plugged into motherboards. Today, though, all new IA-32 motherboards ship with ATA controllers built in, and some motherboards include SCSI host adapters, as well. Even when a motherboard includes a controller or host adapter, though, you may want to add another one or replace an existing one.
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Read how to maintain and repair any desktop and laptop computer. This Ebook has articles with photos and videos that show detailed step by step pc repair and maintenance procedures. There are many links to online videos that explain how you can build, maintain, speed up, clean, and repair your computer yourself. Put the money that you were going to pay the PC Tech in your own pocket.