ok, in a way its like a stripe? I though when you do a stripe you put the metadata on number of disks too. How is that different? Is there a diagram I can refer to? TIA <div class="gmail_quote">On Thu, Jun 19, 2008 at 1:47 AM, Andreas Dilger <<a href="mailto:adilger@sun.com">adilger@sun.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="Ih2E3d">On Jun 18, 2008 20:14 -0400, Mag Gam wrote: > If I am using a Hardware RAID (3ware) with 6 disks and I decide to go with > RAID 5 with stripe of 128KB (default on my controller) and no spare. > By reading documentation I should do 128/4 as my stride size when creating > the file system. I am not understanding how this number works and what > exactly stride does. Can someone care to explain this to me? </div>The "stride" option changes the location of some of the filesystem metadata so that it isn't all located on the same disk. Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc. </blockquote></div>