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Old 08-13-2005, 04:33 PM   #1
Registered: Mar 2004
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How to monitor realtime disk access?


I'm looking for something similar to "top" but for disk access instead of CPU usage. Any help appreciated. I'm NOT talking about how much space is used/free.

Old 08-13-2005, 04:57 PM   #2
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Depending on what you need it for, 'cat /proc/diskstats' tells you a lot. . .
Old 08-13-2005, 06:29 PM   #3
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The reason I'm looking for such a tools is to find which program is thrashing my hard disk when I hear HDD noises all of a sudden. It's mostly some cron job that cleans up the rpmdb, etc. Ofcourse I guess it's those procs, but I would like to be 100% sure though.

Old 08-13-2005, 09:27 PM   #4
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Both vmstat and iostat can show a lot of info relating to disk access (vmstat for paging, iostat for just about everything). I don't think there's a good way to break it down by process, though, since the statistics come from the kernel disk driver level (I might be wrong on this), so it's not a bad idea to keep a terminal open with top running.


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