I've got an older X25-M that doesn't support trim. If I image the drive, format it, then reimage it, would that restore it to roughly its original R/W speeds?
I looked into this again (six months after my original post) and had much better luck: I found the ATA Secure Erase wiki entry. It shows you how to use hdparm to tell the SSD to do a "Secure Erase". From the article:
The exact steps I took were:
I didn't do any before/after measurements, but several people have and it sure looks like the drive is performing like new.
There's also an option to do it using an MS-DOS-only HDDERASE.EXE from 5 years ago - I spent a little time with it and think hdparms is a far superior option. There are a lot of forum postings and blogs about this out there now - google around until you feel comfortable.
But not too comfortable - you don't want to wipe the wrong disk or find out your image was corrupt!
Hmm, sounds risky, per Ars:
Intel was supposed to release tools / utilities for this; Have you tried looking at the Intel Solid State Drive Toolbox?