On 05/10/2012 10:23 AM, Rajasekhar Pulluru wrote: > Hi All, > > I am unable to set chunk size for a raid5 device. > # cat /sys/block/md0/md/chunk_size > 1048576 > # echo 4194304 > /sys/block/md0/md/chunk_size > # cat /sys/block/md0/md/chunk_size > 1048576 > > What could be the problem? That sysfs parameter is read-only. You set the chunk size when you create the array, or use "mdadm --grow" to reshape it. HTH, Phil -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html