expertise from Storage, Exchange, VMware experts

Hello Experts,

I decided to open this question, because I've been dealing with a problematic client who is running into multiple performance issues.

Performance issues can be caused by storage, network, VMware issues. Every SME for each area has indicated that everything looks fine, however sometimes DBs are reseeding, the host where Exchange VMs resides on lost access to datastore, and so on.
This is the third client that I have running this type of issues, and all of them have something in common. They were using mountpoints to place DBs, logs

In one of my clients, My recommendation was to use one single db per virtual disk and same per logs. Then present these virtual disks to each Exchange VMs, and the performance improved 90 %

The problematic clients basically does not want to change the use of mount points, because basically they statement was:

All pieces are separate Volumes, they just are mounted in the Same Mount Point

Can someone from the storage team, VMware and exchange teams provide your thoughts?

Any article that state the use of mount points is not recommended?

Best practices to place DBs and logs for Exchange 2013

Please, I need the feedback from different SME, one for Exchange, VMware and Storage

Our infrastructure below

Exchange 2013 CU8. Windows 2012 R2 standard edition. All are vms running on multiple VMware host 5.5

5 MBX servers in a DAG. 3 MBX servers on site 1, 2 MBX site on site 2

2 CAS servers behind a F5

2 Edge servers in the DMZ network

Storage

Net App
XIO
V7000
Jerry SeinfieldAsked:
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Jerry SeinfieldAuthor Commented:
Any updates?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
How is the storage configured ?
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gheistCommented:
Follow links in the guide to make best prototype for your environment and test before and after each change.
https://www.vmware.com/files/pdf/Exchange_2013_on_VMware_Design_and_Sizing_Guide.pdf
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