I/O Utilization of Specific File System

Hello there,

Below is the output of df -kh:

Filesystem             size   used  avail capacity  Mounted on
/dev/md/dsk/d0          12G   8.8G   2.7G    77%    /
/devices                 0K     0K     0K     0%    /devices
ctfs                     0K     0K     0K     0%    /system/contract
proc                     0K     0K     0K     0%    /proc
mnttab                   0K     0K     0K     0%    /etc/mnttab
swap                    14G   1.7M    14G     1%    /etc/svc/volatile
objfs                    0K     0K     0K     0%    /system/object
sharefs                  0K     0K     0K     0%    /etc/dfs/sharetab
fd                       0K     0K     0K     0%    /dev/fd
swap                    14G   229M    14G     2%    /tmp
swap                    14G    56K    14G     1%    /var/run
/dev/md/dsk/d4         192G    83G   108G    44%    /logfiles

But what I need is that I want to measure the I/O stats for /dev/md/dsk/d4 (/logfiles). I have tried using iostat command but the output of the disk is different from 'df -kh':

root@OJRAD01 [sm(1)-node] / # iostat -dx
                 extended device statistics                 
device    r/s    w/s   kr/s   kw/s wait actv  svc_t  %w  %b 
md0       0.0    0.6    0.2    1.0  0.0  0.0   22.3   0   0 
md1       0.0    0.0    0.0    0.0  0.0  0.0    5.9   0   0 
md4       0.1   23.7   21.3  814.0  0.0  0.4   16.1   0  15 
md5       0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0 
md10      0.0    0.6    0.1    1.0  0.0  0.0   13.6   0   0 
md11      0.0    0.0    0.0    0.0  0.0  0.0    2.7   0   0 
md14      0.0   23.7   10.6  814.0  0.0  0.2    7.8   0  13 
md15      0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0 
md20      0.0    0.6    0.1    1.0  0.0  0.0   11.0   0   0 
md21      0.0    0.0    0.0    0.0  0.0  0.0    9.0   0   0 
md24      0.0   23.7   10.7  814.0  0.0  0.2    6.7   0  11 
md25      0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0 
sd0       0.1   27.2   10.8  815.3  0.0  0.2    7.4   0  12 
sd1       0.0    0.0    0.0    0.0  0.0  0.0    0.0   0   0 
sd2       0.1   27.2   10.8  815.3  0.0  0.2    8.6   0  13 
nfs1      0.0    0.0    0.0    0.0  0.0  0.0    0.7   0   0 

So how can we measure I/O for a particular FS?

Thanks

 iostat -nxd

md4 is the kernel name of /dev/md/dsk/d4 (driver md instance 4).
The iostat -n option maps it to the logical pathname.
--
You can filter for certain disk(s), for example

iostat -dx md4 2