Phantom disk activity (additional)

Bob Rahe (bob@hobbes.dtcc.edu)
Wed, 11 Jun 1997 10:31:15 -0400 (EDT)

My original question:

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I can hear it, perfmeter SEES it, so where is it coming from???? Perfmeter
shows disk io at about 200 (io/sec?) and I can hear it clacking away but the
system is really pretty idle. vmstat doesn't show much disk activity at all,
mostly zero but it DOES show lots of 'in' and 'sy' (40-50 and 200-400
respectively). I've done some traces on all the processes that seem to
be visible etc. with no luck.

This is SunOS 4.1.3. on a SS2. Any ideas how I can find out where the disk
io is coming from???

Tnx, I'll summarize.

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Some ideas have come in and indicating that I should have given more info:

perfmeter shows ONLY disk traffic as being high. swap and paging are
very low 0-3 per interval so it would seem that is not the problem.

iostat (iostat -d 5 or -D 5) shows very little activity at all for
the two disks (!!??)

memory - with a few light users (pine sitting idle for 3 or 4 users
for example) there is about 9 megs available memory (of 64)

pstat -s shows 24320k alloc + 5904k resvd = 30224 kin use and
51092k avail. (total swap is 81 meg)

Someone suggested lsof but that just shows files open and who is using them.
What I could use would be some sort of IO count per file or per process or
something....

ps shows only pagedaemon and swapper in "D" state which seems to be sorta
normal (?)

Some suggested NFS. I'm gonna look into that but I only mount a couple
of file systems from another machine and export none from this one...

Any help would be appreciated...

Tnx,
Bob

-- 
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|Bob Rahe, Delaware Tech&Comm Coll. /                                      |
|Computer Center, Dover, Delaware /                                        |
|Internet: bob@hobbes.dtcc.edu /                                           |
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