What are the IDE,ACHI, and RAID configurations?

What exactly are the IDE, ACHI, and RAID configurations in the BIOS?

Also, which configuration should I use for this hard drive?

WD Caviar Black 1TB Internal Serial ATA Hard Drive for Desktops

1TB maximum storage capacity
Serial ATA interface
Data transfer rates up to 3 Gbps
7200 rpm for fast read/write times
32MB cache buffer
Compatible with PC and Mac
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More about what achi raid configurations
  1. IDE is a legacy controller used for old hard drives and old Operating Systems.

    AHCI replaced IDE. Set it as this unless you are going to use RAID.

    RAID is used with hard drive arrays and comes in different flavors. For instance RAID 0 allows you to combine two drives into a single partition and increase performance. RAID 1 mirrors data between two drives so if one fails you have an identical copy. RAID 5/6 are examples where you have an ARRAY of many drives and can often take multiple hard drive failures. It is used in servers.

    Use AHCI.
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