Read and write disk statistics

I'd like to know how much of the disk activity is for reads and how much is for writes. It seems that there are a few system commands that show statistics about disks activity (iostat, vmstat, systat) but none of them separate reads and writes. Is there some command that shows the READ disk

Re: Read and write disk statistics

$ systat -w 1 iostat Federico Giannici wrote: I'd like to know how much of the disk activity is for reads and how much is for writes. It seems that there are a few system commands that show statistics about disks activity (iostat, vmstat, systat) but none of them separate reads and writes.