iostat - Disk busy

From: Suresh Bangalore (suresh@ind.tansu.com.au)
Date: Thu Nov 25 2004 - 19:37:48 EST


Hi Gurus

iostat on one of our servers display one of the disk is always 100% busy.
Unable to figure it out what process is bombarding the disk to make it so
busy.

iostat -xnc 5
                    extended device statistics
    r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
  178.1 0.0 852.9 0.0 0.0 1.8 0.0 10.0 0 100
c5t60020F200000BEE73DE5719F0000A43Fd0

This partition size is 490GB. I tried using lsof and few other commands
but still can't figure what process is bombarding the disk to be 100%
busy.

OS is Solaris 9.
Was wondering whether iostat output is correct.
Also we have applied an iostat patch and still the result is the same.

Any ideas?
Thanks
Suresh
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