Have a Hyper-V environment - 4 hosts sharing a single Powervault md3800f with 10 x 15k SAS in RAID10 connected via redundant fibre channel.
Average IOPS, latency, throughput, queue depths etc. all very much acceptable and actually lower than expected. But I'm seeing regular spikes and the odd complaint of slowdowns.
I've noticed on the SAN that it's showing 100% write cache hit but most of the time less than 50% read cache hit.
So would we benefit from putting in an SSD drive to use as read cache, bearing in mind that the read percentage is around 40% ?