I use md arrays made up of slots synthesized through device mapper from physical storage distributed across a cluster of machines. When these slots are created, they are guaranteed to be zero-initialised, so I can safely do mdadm --create --assume-clean to avoid an initial resync. When I grow the backing slots, the new storage space is also zero-initialised, so I'd like to be able to do the equivalent of mdadm --grow --size=max --assume-clean. However, --assume-clean isn't supported for grow operations. Is there some way I can tell the kernel driver (perhaps through sysfs) that the resync is clean/already complete to avoid unnecessary heavy IO on every grow? I tried things like echo idle >/sys/block/mdX/md/sync_action without success. Cheers, Chris. -- 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
