PowerEdge 2900 III PERC 6/i SSD Raid

hi

I want to upgrade a PowerEdge 2900 III Server to windows 2012 r2 and use this opportunity to upgrade the two OS Raid 1 HDDs to a two Disk SSD Raid 1.

I know that the PERC 6/i supports SSDs in a single drive, but what's about a Raid and can the Trim-commands be used there? If not, is Trim not so important and I can still use SSDs for a Raid 1 or is it better to use normal SAS/SATA HDDs  instead?