[Help] How to use "iostat" or other command to monitor Software RAID I/O ????

[axacheng <axanet@ms32.hinet.net>]

Hello lists :

Does anyone knows , How to monitor Software RAID disk I/O ????

i have a Software RAID5 device named  "/dev/md0" , i've tried to use "iostat" to monitor /dev/md0   I/O status ...

But, it's seems doesn't work  !!!
===========================
fileserver:/etc/rc.boot# iostat -x /dev/md0
Linux 2.4.20-xfs (fileserver)   07/10/03
avg-cpu:  %user   %nice    %sys   %idle
                 1.18       0.01     1.05   97.76
Device:    rrqm/s wrqm/s   r/s   w/s  rsec/s  wsec/s    rkB/s    wkB/s avgrq-sz avgqu-sz   await  svctm  %util
===========================


i've tried to use "mdadm"also, but same as "iostat" result (no more I/O output!!!)

Does anyone knows , How to monitor Software RAID disk I/O ????

Thanks.



-- 
Trust & Unique ...
axacheng <axanet@ms32.hinet.net>