Hi, I run two SSDs in a RAID-1 configuration and I have a swap partition on a third SSD. Over time, the mismatch_cnt between the two devices grows higher and higher. Once a week, I run a check and repair against the md devices to help bring the mismatch_cnt down. When I run the check and repair, the system is live so there are various logs/processes writing to disk. The system also has ECC memory and there are no errors reported. The following graph is the mismatch_cnt from June 2013 to current; each drop represents a check+repair. In September, I dropped the kernel/vm caches before running check/repair and that seemed to help a bit. http://home.comcast.net/~jpiszcz/20131104/md_raid_mismatch_cnt.png My question is: is this normal or should the mismatch_cnt always be 0 unless there is a HW or md/driver issue? Justin. -- 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
