Probably want to see an example: Here are the contents of /proc/mdstat showing my RAID setup:
~$ cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid10 sde1[3] sdd1[2] sdc1[1] sda1[0] 976507904 blocks super 1.2 512K chunks 2 near-copies [4/4] [UUUU] unused devices: <none> Here is the output from iostat: ~$ iostat Linux 3.16.0-30-generic (ubuntu-14-host-1) 07/23/2015 _x86_64_ (8 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 0.70 0.01 3.20 1.34 0.00 94.75 Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn scd0 0.00 0.00 0.00 364 0 sda 34.46 3547.63 639.09 489331206 88150401 sdb 3.02 13.67 133.56 1884994 18422682 sde 33.64 3541.25 1168.16 488451131 161126847 sdd 33.70 3547.11 575.37 489259403 79361407 sdc 26.20 3541.55 3910.41 488492828 539369281 sdf 17.78 1150.44 0.02 158681884 2936 dm-0 5.42 13.65 133.56 1882281 18422676 dm-1 5.19 13.63 133.56 1880521 18422676 dm-2 0.00 0.01 0.00 1076 0 md0 13.28 18.22 1213.40 2513792 167365856 In this case sda,sdc,sdd, and sde are the raid -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to sysstat in Ubuntu. https://bugs.launchpad.net/bugs/1477347 Title: Output from iostat has the total read and total write columns backwards in Ubuntu 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sysstat/+bug/1477347/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs