On Sunday December 2, jpiszcz@xxxxxxxxxxxxxxx wrote: > > Was curious if when running 10 DD's (which are writing to the RAID 5) > fine, no issues, suddenly all go into D-state and let the read/give it > 100% priority? So are you saying that the writes completely stalled while the read was progressing? How exactly did you measure that? What kernel version are you running. > > Is this normal? It shouldn't be. NeilBrown - 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