On Mon, Oct 10, 2011 at 05:04:43PM -0500, Jeffrey Hundstad wrote: > On 10/10/2011 03:28 PM, Greg Freemyer wrote: > >fitrim is the batch mode. > > > >To enable realtime discard, add --discard to your mount options. > > > >Documented athttp://lxr.linux.no/#linux+v3.0.4/Documentation/filesystems/xfs.txt > > > >To invoke batch mode, simply use fstrim from user space. > > Hello, > > I'm also trying to use FITRIM on a simple XFS partition on a > spinning magnetic hard drive (remember those). I haven't had much > luck. I'm doing this just to get used to the commands when using > this against a thinly provisioned disk. I have no idea if this > should work in this configuration. > > On a Debian system with Linux 3.0.0-2-amd64 when I issue: > # fstrim / > > I receive: > fstrim: /: FITRIM ioctl failed: Operation not supported > > With an strace this looks like: > open("/", O_RDONLY) = 3 > ioctl(3, 0xc0185879, 0x7fff4ea851b0) = -1 EOPNOTSUPP (Operation > not supported) It means the block device underneath the filesystem doesn't support the TRIM operation. Check /sys/block/<dev>/queue/discard_max_bytes - if the value is zero then your device doesn't support discard operations. Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
