ElevenB2003
Enthusiast
Enthusiast

You could try spinning up a single VM (clone the one you're using as your replica) and connecting to that to see if your performance picks up since it will be a 1 to 1 setup.  If it's faster then you're issue is more than likely storage performance. You can also dig into the performance logs built right into the vSphere client and look at disk latency on those datastores, ect.

I've seen a pool of 34 linked clones chew up 9K+ IO during login (all logging in around the same time).

Also, what kind of IO numbers does that SAN provide and are you running other services on those disks other than VDI?

Did you build your base disk (replica) using VMware's Windows 7 guide?  They include a great script that will optimize (disable) services that aren't required by VDI and will increase the performance of your Windows 7 desktops.

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