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My disk often is utilized, but top (and htop, a custom replacement) show nothing suspicious.

Is there a way to sort processes by I/O (more specific: disk) utilization?

EDIT
Found out using iotop that those strange processes are flush-8:16 and jbd2/sdb3-7. Seems to have to do with usual filesystem operations.

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Have you tried iotop ?

You may need to install it before. Also, it depends on a kernel feature that may or may not enabled in your specific distribution.

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Great! Thank you! – java.is.for.desktop Mar 2 '10 at 16:22
Works on Mac OS X, too. Not sure that it is going to help with the problem at hand, though. – dmckee Mar 2 '10 at 16:27
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wow. That's fantastic. 15+ years of admin work and I've never run into that. Thanks! – skarface Mar 2 '10 at 17:06
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You might want to give atop a try. It seems to do a good job of letting you know what is going on.

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