On Thu, 8 Nov 2012, Andres Toomsalu wrote: > Date: Thu, 8 Nov 2012 00:03:15 +0200 > From: Andres Toomsalu <andres@active.ee> > Reply-To: LVM general discussion and development <linux-lvm@redhat.com> > To: LVM general discussion and development <linux-lvm@redhat.com> > Subject: Re: strange usage stats for thin LV > > Apparently that does not work - FITRIM ioctl not backported to RHEL6 kernel perhaps? > > fstrim -v /backup > fstrim: /backup: FITRIM ioctl failed: Operation not supported > > df -h > /dev/mapper/VolGroupL0-thin_backup 591G 104G 458G 19% /backup > > mount (added discard option today) > /dev/mapper/VolGroupL0-thin_backup on /backup type ext4 (rw,discard) > > Cheers, Hi, can you please check if the device *really* support discard ? What is the output of grep . /sys/block/<device>/queue/discard_* <device> is whatever /dev/mapper/VolGroupL0-thin_backup is pointing to. Thanks! -Lukas _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
