Despite their many advantages SSDs have some limitations, one of the things you must have is TRIM. The problem is that the TRIM commando does not work with SSDs in RAID, something Intel has solved in its latest drivers that should come out soon.
When it comes to storage units in comuters the thing is that when you have deleted a file, it is still there until it is overwritten by a new file. This is not a problem for mechanical drives, but proved to be an achilles heal with SSDs that lost performance as they filled up. SSDs uses flash memory cells and writing over a memory block is a slow and painful process.
When all the memory has been written once it is not just a matter of writing new data to the cells. The old data first has to be read to the cache to be deleted, and then you can write new data. You can tell when this happens, as many reports freezes that can last for seconds. The remedy of the problem was TRIM, a command the operating system sends to the SSD. It reports that the data is no longer in use and deletes before the user actually needs it.
TRIM does not work with RAID configurations, so users that wanted even better performance would have to do without that. Intel’s new RST 11.5 drivers (Rapid Storage Technology), currently in alpha stage, will add TRIM with RAID 0. This at least allows for performance boosts, while security is none the wiser.
The Alpha version of Intel RST 11.5 was released on August 5th, which points to a beta soon and a final version not too far into the future. The RAID 0 support should apply to all compatible SSDs with a relatively modern Intel motherboard.
Source: StorageReview
