On Fri, Feb 26, 2010 at 10:11 AM, Bill Pemberton <wfp5p@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: >> >> Does the array have any kind of writeback cache? >> > > Yes, the array has a writeback cache. > >> >> Are all of the filesystems spread across all of the drives? Or do some >> filesystems use some drives only? >> > > In all cases the array is presenting 1 physical volume to the host > system (which is RAID 6 on the array itself). That physical volume is > made into a volume group and the filesystems are on logical volumes in > that volume group. > I wonder if the barrier messages are making it to this write back cache. Do you see any messages about barriers in your kernel logs? -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
