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On Solaris, iostat tells me that a device is 92% busy, but how do I find out what programs are making the requests?

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up vote 9 down vote accepted

If you mean Solaris 10 try iotop, a DTrace script by Brendan Gregg. It lists the device (fifth column).

You can find some other particularly useful DTrace scripts at

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iotop is also part of the DTrace Toolkit – Iain May 4 '11 at 15:32
I tried it, but alas my login is insufficiently privileged. – Thomas L Holaday May 4 '11 at 18:14

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