Quote Originally Posted by Lurkios View Post
Google is a good one.
Please use it. http://lmgtfy.com/?q=trim

TRIM is completely unrelated to wear leveling, which is performed entirely by the controller and will work regardless of the OS/device the drive is installed in - nor is TRIM in any way related to the drives lifespan. TRIM is purely performance related, it zeroes out blocks of data that have been tagged as "free" space. Most modern SSDs include a "garbage collection" feature which does the same thing, making TRIM largely irrelevant.
OMG, please use at least Wikipedia before spreading this nonsense.
TRIM is the command, which actually tags the free space, it doesn't zero anything. Without it the drive doesn't know which data is still in use and once the drive was full once, it will be full forever for the drive firmware. Once the OS tells the drive which areas are free, it makes garbage collection more efficient and reduces the number the writes needed, thus increases the life span of the drive.