On Mon, 20 Mar 2017 01:44:09 +0100 Youenn Gestin <youenn.gestin@xxxxxxxxxxxxxxxxx> wrote: > abyss ~ # dd bs=1M count=2024 if=/dev/zero of=/dev/md/md6to > conv=fdatasync > 2024+0 records in > 2024+0 records out > 2122317824 bytes (2,1 GB, 2,0 GiB) copied, 14,5074 s, 146 MB/s > > I'll check about this function to see if i'll need it or not tomorow, Instead of disabling it you can alter the bitmap chunk size, and at larger chunk sizes it does not affect the performance as much. http://tgharold.blogspot.fr/2013/01/mdadm-using-bitmaps-to-speed-up-rebuilds.html For 6TB drives try 256 or even 512MB for the size. -- With respect, Roman -- 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
