What is your HDD chipset?
When an SSD is a member drive of an Raid array,Currently the only chipset/Driver that support Trims is the Intel 7 series Chipset (IB) coupled with latest Intel driver rst ver 11.x.
Loved Raid0 for OLD mechanical HDDs, Do not fnd much advantage with SSD.
Main parameter that benifits from Raid0 is Sequencial perormance. Therefor little performace boost to OS Load and Program load. Raid0 does nothing for Access time and Very little improvement for smal 4 K random performance.
Only time I recommend raid0 with SSDs is when you do a lot of Photo editting of LAE jepeg/Bitmap photos o Manupulate thoe 1gig DVD movie files, or the 30 gig Blue-ay files.