Looking at the initial commit for TRIM in the kernel I can see that it's calling ata_id_has_trim() and passing in the disks ID. This looks like it filters disks that don't support TRIM.
You can see the commit for trim in the 2.6.33 kernel here: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=18f0f97850059303ed73b1f02084f55ca330a80c If you want to investigate the ata_id_has_trim function more closely you can find it in include/linux/ata.h. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/864051 Title: TRIM support not enabled for SSDs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/partman-target/+bug/864051/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs