SSD with/without TRIM?



We've all heard that SSDs are better/faster than HDs. However, the life of the media degrades with write I/Os and the use/non-use of the TRIM feature.

A trim command (known as TRIM in the ATA command set, and UNMAP in the SCSI command set) allows an operating system to inform a solid-state drive (SSD) which blocks of data are no longer considered in use and can be wiped internally.[1]

Trim was introduced soon after SSDs were introduced. Because low-level operation of SSDs differs significantly from hard drives, the typical way in which operating systems handle operations like deletes and formats resulted in unanticipated progressive performance degradation of write operations on SSDs.[2] Trimming enables the SSD to more efficiently handle garbage collection, which would otherwise slow future write operations to the involved blocks.[3]

Highly recommend the WiKi which discusses SSD Trim processing.