On Solaris, how can I tell what processes are doing disk i/o on a particular device?
Solution 1:
If you mean Solaris 10 try iotop, a DTrace script by Brendan Gregg. It lists the device (fifth column).
http://www.brendangregg.com/DTrace/iotop
You can find some other particularly useful DTrace scripts at http://prefetch.net/articles/solaris.dtracetopten.html.