Has anyone done any baseline testing of these 2 solutions. We currently use Cisco IOA for True Copy acceleration over 120km. this has been in place for several years and is somewhat problematic when doing Cisco firmware upgrades. We are looking to switch to the Native HDS "Fast Write" soultion available on our current VSP infrastructure. We are not able to do so with our USPV's and will need to remain on IOA till refresh time, due to the requirement to have specific CHA cards installed. Just wondering if anyone has made a similiar move and was there any increase/decrease in latency with the change. We are putting together a small test bed to do some baseline, I was curious if others hads done similiar.