VMWare Disk Performance Monitoring on a VM

We have a good amount of VMs in a hosted vmware environment. Our service provider offers faster speed disks for our vms.. Currently we are on the slowest SATA based SANs. I am not sure if I need to upgrade to the faster disks, but want to make sure my VMs are doing ok on the current SANs. What is the best way to monitor my disk performance? Are there any 3rd party tools for checking as well?
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MaximK10Connect With a Mentor Commented:
Hancocka mentioned Veeam Monitor Free Edition which is now Veeam ONE Free Edition.

Veeam ONE Free Edition has 24x7 real time monitoring, resource optimization, management reporting and much more. You can get all the details here - Veeam ONE Free Edition
big_daddy0690Connect With a Mentor Commented:
The easiest way is to monitor the disk latency counter in the advanced performance chart.

This article will give you good information on calculating the IOPS you currently have per VM.

This article provides steps to monitor your current storage performance using esxtop.

Detailed information on monitoring performance in vSphere.
Andrew Hancock (VMware vExpert / EE MVE^2)Connect With a Mentor VMware and Virtualization ConsultantCommented:
see my EE Articles

HOW TO:  Performance Monitor vSphere 4.x or 5.0

Faster speed disks will make an improvement of VM performance, but it also depends on what RAID configuration the datastores are configured on.

Faster the disks, e.g. 10,000 rpm compared to 7,2000rpm, the IOPS are better.
LeviDailyAuthor Commented:
Thanks all!
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