Hi all. I've setup a system with two RAID volumes. One is a small RAID-1, /dev/md0, with the /boot content, the other is a RAID-10 f2, with LVM, for the rest of the system. I just noticed that /dev/sdb, which is not the boot disk, I assume, has more reads than /dev/sda. Writes are the same, here is the output of "iostat": Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn sda 10.08 183.15 408.74 755018 1684972 sda1 0.04 1.24 0.02 5118 66 sda2 10.03 181.71 408.72 749071 1684880 sdb 10.49 187.64 408.74 773532 1684972 sdb1 0.03 1.17 0.02 4837 66 sdb2 10.44 186.26 408.72 767832 1684880 md1 62.95 367.26 391.79 1513976 1615112 md0 0.02 0.18 0.00 724 8 Note that sda1 has more reads than sdb1. This is possibly due to the fact that it is used during boot. What is strange, is sdb2, which has by far more reads than sda2. Both belong to /dev/md1. Note also the /dev/sdb is the slowest of the two drives. Is that somehow normal? If not, is it possible to find out what or why the reads are unbalanced? Thanks a lot in advance, bye, -- piergiorgio -- 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
