On Aug 22, 2014, at 1:55 AM, John Austin <ja@xxxxxxxxxx> wrote: > Hi > I have a Corsair Flash Voyager GTX USB3 memory stick which is > advertised as supporting TRIM. > > I assume there are several other manufacturers with similar devices > > My device is working well (ext4) and is very fast but does not appear to > respond to the TRIM command even though hdparm suggests it should > > I have found the same problem referenced here > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1336541 > but following the kernel link I am not totally convinced things > are happening upstream > > Should I bugzilla this against Fedora this or just wait? You could strace the mount and see if it's checking /sys/block/sdb/queue/rotational This is commonly done to see if the device supports trim/discard first. If it's a 1 then it may be a udev thing. Likewise you can strace mkfs.ext4 which I think defaults to -E discard if the value for ../rotational is 0. I know this is the case for mkfs.btrfs. See thread "zeroing out part of an SDcard" for some things I found relating to SD Cards. Chris Murphy -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
