On Sun, Feb 02, 2014 at 11:09:11AM -0700, Chris Murphy wrote: > On Feb 1, 2014, at 2:44 PM, Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx> > wrote: > > On 2/1/2014 2:55 PM, Chris Murphy wrote: > >> On Feb 1, 2014, at 11:47 AM, Stan Hoeppner > >> <stan@xxxxxxxxxxxxxxxxx> wrote: > > When nesting stripes, the chunk size of the outer stripe is > > -always- equal to the stripe width of each inner striped array, > > as I clearly demonstrated earlier: > > Except when it's hardware raid6, and software raid0, and the user > doesn't know they need to specify the chunk size in this manner. > And instead they use the mdadm default. What you're saying makes > complete sense, but I don't think this is widespread knowledge or > well documented anywhere that regular end users would know this by > and large. And that is why this is a perfect example of what I'd like to see people writing documentation for. http://oss.sgi.com/archives/xfs/2013-12/msg00588.html This is not the first time we've had this nested RAID discussion, nor will it be the last. However, being able to point ot a web page or or documentation makes it a whole lot easier..... Stan - any chance you might be able to spare an hour a week to write something about optimal RAID storage configuration for XFS? Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
