In the interests of fighting ignorance, I’ll point out that this is only partially true: a mirror set / RAID 1 will be marginally slower on writes because it’s got to write twice but those writes take place simultaneously, not sequentially; but it can be significantly faster on pure reads because it can read two seperate parts of the file simultaneously. You usually need a proper RAID controller for this, though, rather than the software RAID that is in many PCB BIOSes.
Just an FYI from the Middle-Aged, Middle-Class, Mid-American Real World: Computers now come with Vista. Period. If you want to buy a new computer, it comes with Vista. Period. If you want a new computer with XP, you have to special-order it, and it costs extra, and that’s only if you know in the first place that it’s possible even to obtain a computer that does not have Vista installed on it. Because out here in the heartland, Best Buy and Circuit City and Wal-Mart sure aren’t gonna tell you.
I have a very dear Church Lady friend who is grimly soldiering on with her ME, which is no longer up to the challenge of today’s Internet, because she’s terrified of using Vista, and equally terrified of calling Dell or somebody and special-ordering an XP.
You have that backwards. Mirroring increases read speeds and increases reliability. Striping increases read and write speeds at the expense of reliability.
The easy way to remember is that in RAID-0, the 0 stands for how many files you’ll be able to recover if one of your disks crashes.