On Feb 11, 2014, at 11:11 AM, "Gallas, William N" <william.n.gallas@xxxxxxxxx> wrote: > > Hi, > > I have a raid 6 unit that takes over 40 hours to rebuild from an HDD fail condition. I have ample CPU cycles available and was wondering > if MDRAID throttles the rebuild speed. Yes. It's probably a combination of too small md/stripe_cache_size, and /proc/sys/dev/raid/speed_limit_max and maybe /proc/sys/dev/raid/speed_limit_min. Another possibility is misalignment due to incorrect partitioning of a disk with 4KB physical sector sizes. Chris Murphy-- 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
