[geggam]

Been using an SSD in my laptop for 6 months now... UFS / FFS doesnt really seem to fragment that much

# fsck / | grep frag 6395 files, 106651 used, 409612 free (300 frags, 51164 blocks, 0.1% fragmentation)

# fsck /usr | grep frag 396741 files, 4832173 used, 19820289 free (4953 frags, 2476917 blocks, 0.0% fragmentation)

# fsck /home | grep frag 1192199 files, 27780639 used, 3176062 free (216374 frags, 369961 blocks, 0.7% fragmentation)

[delan]

The effect of fragmentation on file systems on SSDs is minimal, and fragmentation is not related to TRIM. http://askubuntu.com/a/537211/1624