Is there a good command line utility to monitor hard disk load on linux? Something like
top but then monitoring disk activity i.s.o. cpu usage.
More specifically, I suspect that for some (heavy load) servers after several optimizations on various parts of the program(s) that run on it, right now the bottleneck is simply the logging to files on the disk. But I find it very difficult to assess how much traffic the servers can handle.
My ideal tool would be something that prints "You're using 35% of your disk bandwidth right now". Any ideas?