But, non-TRIM is heading towards obsolescence quite quickly. Zero filling is a way of 'trimming' SSD's where TRIM is not enabled, perhaps that's why Piriform use it. Here's a screenshot of a manual trim I tried to perform on 2 drives. Any idea on how to fix this I have TRIM enabled and Samsung SSD magician installed. The hard drives are fine and can be optimized and such, but all of the options to optimize my ssd's are greyed out. Well, I know it sends a TRIM command to all unused pages, but I don't think it is as clunky as zero filling. On all of my SSD's in disk defragmenter it shows as optimization not available.

I don't know about Windows SSD optimisation under Win 8 (and 7?). Zero filling will hammer the SSD and the MFT pages in particular. If you don't have TRIM then your SSD and O/S must be quite old. If you have TRIM enabled then SSD optimisation should very rarely be needed, maybe once or twice a year if you must. Just leave the pc powered on for a few hours. It may be that, depending on the size of the SSD and the ratio of used/free space, and how long your pc has been powered up, that the GC hasn't had time to complete its processing. They will then be available for future writes. The empty state of an SSD page is all ones, despite the fact that a read will display as zeroes.(The SSD controller won't let you access an empty page directly.)

The GC will empty these pages and compact them into blocks, as a background task. If you have a TRIM enabled device all the zero filled pages will be flagged as invalid, and made available to the garbage collector. As far as I can tell SSD optimisation is a write process, so nothing can undo it.ĭefraggler's SSD optimisation is reportedly a zero fill process, i.e the SSD is filled with zero-byte pages which are then deleted.

Ssd optimization not available