IO diagnose tools?

[Ding Honghui <hhding.gnu@gmail.com>]

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hi list

vmstat 1 shows my debian box wa in field cpu is about 9x% and bi in
field io is high(about 2000-7000).

1. Is it means some processes are accessing my disk heavly?
2. If so, is there any IO diagnose tools exist to find out which process is?

- --
Best Regards,
Ding Honghui
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