What could be causing the write percentage to be very high on my 2008 R2 servers? I ran diskmon to see what the disk activity looked like and it's almost all writes, even when I'm the only user logged in and not running any programs. I am not seeing any performance problems, latency, etc, but it strikes me as odd that there is so much writing happening. I'm also not seeing any problem with disk space being used up, so it must be processes that are constantly overwriting something?
I'm seeing the same type of activity on physical servers and VMs. The VMs are on an equallogic san, and SanHQ shows above 95% write percentage pretty consistently on the Windows server LUNs. FWIW. most of these servers are in their own LUNs, and they are separate from the data LUNs.
Is this normal?