I worked on a computer this weekend that had two hard drives (150 GB each) in a RAID (Redundant Array of Independent (or Inexpensive) Disks) configuration. It was the first time I had worked with this type of computer. There are different flavors of RAID available and they are described as Level 0, Level 2, etc). In simple terms, RAID automatically makes copies of everything on the first hard drive to the second hard drive…also known as mirroring.
This is done for a couple of reasons. The first is obviously backup. RAID allows for continuous seamless (and transparent) backup from one drive to the other. Performance for some applications like high end graphics or Computer Aided Drafting (CAD) becomes slightly better with hard drives configured in a RAID format. Up until recently, RAID has been reserved primarily for computer servers (think large offices, Internet providers, web hosting, etc). Hard drive costs have dropped dramatically in recent years and storage size is skyrocketing. These two factors are propelling the implementation of RAID in personal computers.
RAID certainly isn’t for everyone, but if you buy a computer in the near future and RAID is an option for not much money, it won’t hurt to opt for this feature. Even with the continuous backup offered with RAID, I still recommend that computer users backup essential data on solid state memory like CD’s, DVD’s or USB flash drives.
