Are RAID arrays any more or less susceptible to fragmentation? I'd assume they were about the same, but when I load up Diskeeper once a week the drive is always heavily fragmented. My old WD 120gb drive was always slightly fragmented.
as far as the OS is concerned it just a single big drive so fragmented space as reported is the same,
of course it is split over the stripe width, but that is invisble to the OS