One of the barriers to using SSDs in RAID setups, other than the high price of the drives themselves, has been the lack of TRIM support when running in that mode. TRIM is a command that allows an OS like Windows 7 to inform an SSD which blocks of data can be wiped and marked for re-use. This process, sometimes referred to as garbage collection, mitigates the performance degradation that inevitably occurs as an SSD becomes “dirty.”
