Diagnose high disk write IO

UNIX AIX
1

Hi, say for example if there is high disk write IO in one disk (detected from NMON), how to we identify what processes is writing on that particular disk?

2

for filesystems
man fuser

3

works with block devices too

oracle asm disks or raw lvs for example

fuser /dev/rhdiskxx
4

Okay, I will try to use that. Thanks.