Esxi5, Emc vnx5300 over fc, lun drop errors

[jstump]

8 hosts in vmware esxi5 cluster running on hp 465c g7 blades with emulex lpe1205 8gb fc mez cards, connected to dc04 hp fiber manager, attached to emc vnx5300 storage, seeing lun drop errors, any ideas? 

[Virtualinfra]

Welcome to the community.

What is the error?-

"May be due to SCSI reservation on the LUNs not released. See if there is a VAAI code compatable with storage and install on all the esxi should resolve this problem. "

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[jstump]

Well it seems our dc04 fiber switch firmware wasnt up to date and set to setting of 3, so we downgraded the ports going to that enc to 4gb and errors went away.

[mcowger]

We need a ton more information.

How is your storage network setup?  How many paths do you have?  Can we get some logs from ESXi?  How about the storage?  What errors do you see?