>> I did used these utilities, while it can help see what processes are >> generating IO, it doesn't show what files on the file system are being >> asked >> or waited for. >> >> Basicly, what I'm searching is an equivalent for fs_usage on Mac OS X, or >> tcpdump, but on a bloc device... > > Not sure what those do, but lsof should show what files are open, and > 'strace -p process_id' would show the system calls issued by a > process. Thanks, that might be usefull. I'ill just have to find a way to strace multiple process at once and find the usefull info among that load of data... Nicolas