VMWare DataStore Inactive

We added a new host to our VMSphere 5.0 infrastructure.  We tried connecting storage on the EMC VNXe SAN to it with no luck.  Suddenly though, a datastore hosted on the same storage device for a different VM is listed as inactive.  No idea what went wrong.  Can someone help us?
cssunetadminAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Check access and lun mappings on SAN
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cssunetadminAuthor Commented:
It all looks good.
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cssunetadminAuthor Commented:
Here is a little more info.  From the VM host, I can ping the VNXe  device however from VNXe, I cannot ping the host.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Are any VMs missing?
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cssunetadminAuthor Commented:
So, in the end, it looks like the host has issues with a nic card.  Replaced it and all looks OK.
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cssunetadminAuthor Commented:
Good suggestion to help rule out potential issues. Problem turned out to be a funky nic card.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
No problems.
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