One of the nice surprises (though it shouldn't have been a surprise) in the Mac OS X Lion preview that Apple released last week is the addition of TRIM support. Since the long-term future of the Mac is with solid state drives, it's about time added this.
A TRIM command allows an operating system to inform an SSD which data blocks, such as those belonging to a deleted file or affected by a format command, are no longer being used so can be wiped internally. That's important because the low-level operation of SSDs differs from traditional hard disk drives in the way operating systems handle operations like deleting and formatting. TRIM enables the SSD to handle garbage collection overhead which would otherwise significantly slow down future write operations to the involved blocks, in advance. In other words, it helps maintain optimal performance and extend the life of your SSD.
Mac OS X 10.6 doesn't optimally handle SSDs. All versions of OS X up to Lion treat SSDs as a...| Read more »