On a VMware ESXi 5.0 host, how can I check if fiber storage adapters are properly connected to the fiber switch/SAN, i.e. if the fiber link is up?
Select the host, look at the Configuration tab, chose Storage Adapters, select each HBA, refresh, check that both HBAs have the same number of targets/LUNs then if needed select each LUN and look at their paths.
Alternative look under Configuration, Storage, select a datastore then look at Properties and Manage Paths.
This information is shown nowhere in the vSphere Client, and there is no command-line tool to check it, either.
The only way to verify if a fiber link is up is to access the ESXi shell and go to
For an active link:
For an inactive link: