RAID 1 has some benefits of RAID 0

RAID 0: Also commonly known as a stripe set (as it provides no redundancy, one of the useful parts of RAID) data is broken into blocks by the controller or the software and alternating block sent to each disk in the array. By doing this, sustained transfer rate is increased. However, as this has no effect on the seek time it does not improve desktop usage. It is useful mostly for video editing requiring tremendous STR. Also, MTBF of the array is decreased dramatically with each disk that is added, so array availability is very poor. This requires two or more disks.

RAID 1: Also commonly known as a mirror set, each disk contains an exact copy of the other. Because each disk contains exactly the same information, under a heavy random read load a mirror set can provide nearly double the performance as each disk can independently service a different request. However, they must execute a write together, which leads to modestly lower write performance. Two disks are required.Since desktop performance is heavy in random reads…tongue

 
And the RAID controllers have advanced significantly since those cheapo ones were developed.  The ICH8R, for instance, does support multiple independent reads, as do newer nVidia chipsets.  I’m not sure about older ones, but that should also be the case on Intel dating back to the ICH7R at least (vPro and all that).  So long as you’re not using a cheap add-on card, you’re usually fine.Side note: my box is actually both vPro and ViiV compliant.  Slick, eh?