Hi all, just found this here: http://wiki.freebsd.org/WhatsNew/FreeBSD10#Storage_subsystems.27_improvement... "As a world's first, FreeBSD now has TRIM support in ZFS!" Interesting not just for the technical fact (TRIM is a "SSD supportin feature") but also for the fact that ZFS is getting new features after the "OpenSolaris source" was closed. Another thing that came to mind when reading the e-mails over the last days: The "80% feature" (performance degrates after 80% space is filled) is due to the fact that the block selection changes then - from "first fit" to "best fit" (and that seems to suck..) Under Solaris there is a "magic hack" (I don't find the URL at the moment) to delay the change of policy. I don't know about any way to tweak it under FreeBSD (or Linux). It looks as btrfs avoids that problem by a different block allocation design? Regards Peter