Public bug reported: When iostat is run with the flag "-p ALL" (for example iostat -xk 1 -p ALL), on a system with md0 being RAID10 with RAID devices: sda, sdb, sdc, sdd, sde, sdf, the output looks like this. Note that iostat does not report any load on the individual partitions on the RAID device:
sdb 0.00 25.00 0.00 32.00 0.00 5003.00 312.69 0.30 9.50 0.00 9.50 2.50 8.00 md0 0.00 0.00 0.00 144.00 0.00 13832.00 192.11 0.00 0.00 0.00 0.00 0.00 0.00 md0p1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 md0p2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 md0p3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 md0p4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 md0p5 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 md0p6 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 md0p7 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 sda 0.00 25.00 0.00 32.00 0.00 5003.00 312.69 0.24 7.88 0.00 7.88 2.62 8.40 sdf 0.00 15.00 0.00 30.00 0.00 3697.00 246.47 0.26 8.93 0.00 8.93 3.87 11.60 sdc 0.00 30.00 0.00 32.00 0.00 5140.00 321.25 3.29 101.75 0.00 101.75 20.88 66.80 sde 0.00 15.00 0.00 30.00 0.00 3693.00 246.20 0.22 7.47 0.00 7.47 3.47 10.40 sdd 0.00 22.00 0.00 41.00 0.00 5144.00 250.93 1.98 48.59 0.00 48.59 11.71 48.00 On the other hand, what one would expect is output like this (with load reported on individual partitions). This is from a system without RAID: sda 117.06 59.83 8.61 63.48 681.33 504.74 32.91 0.54 7.48 16.37 6.27 4.99 36.01 sda1 0.91 0.33 0.80 0.46 8.73 2.25 17.45 0.02 17.86 6.82 37.11 8.86 1.11 sda2 0.00 0.00 0.00 0.00 0.00 0.00 2.00 0.00 18.00 18.00 0.00 18.00 0.00 sda5 0.00 0.00 0.00 0.00 0.00 0.00 9.02 0.00 3.09 3.09 0.00 3.05 0.00 sda6 4.65 1.10 0.33 1.86 23.53 37.97 55.96 0.06 26.88 10.90 29.74 9.73 2.14 sda7 0.01 8.47 0.00 38.86 0.03 352.76 18.16 6.34 163.22 24.15 163.22 0.81 3.14 sda8 0.28 0.07 0.33 0.02 2.43 0.34 16.21 0.00 12.46 2.89 193.10 2.45 0.08 sda9 111.22 49.86 7.15 21.21 646.61 111.43 53.46 1.18 41.44 18.31 49.24 12.10 34.32 sdb 201.12 49.85 11.47 21.55 1028.82 111.43 69.07 0.63 19.10 6.83 25.63 7.45 24.60 sdb1 201.12 49.85 11.47 21.55 1028.82 111.43 69.07 0.63 19.10 6.83 25.63 7.45 24.60 sdb2 0.00 0.00 0.00 0.00 0.00 0.00 9.11 0.00 0.55 0.55 0.00 0.55 0.00 Thanks! ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: sysstat 10.0.3-1 ProcVersionSignature: Ubuntu 3.2.0-31.50-generic-pae 3.2.28 Uname: Linux 3.2.0-31-generic-pae i686 ApportVersion: 2.0.1-0ubuntu15 Architecture: i386 Date: Mon Dec 3 10:43:41 2012 MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) SHELL=/bin/bash SourcePackage: sysstat UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: sysstat (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug i386 precise -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1086016 Title: iostat does not report load on individual partitions within RAID10 block device To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sysstat/+bug/1086016/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs