I've just upgraded a XenServer host from 5.5.0 to 5.6.0 SP2, however on restart, I get the following message in XenCenter:
Failed to attached storage on server start
This refers to a 2 TB lun on a NetApp filer via Fibre Channel. Other hosts in the pool (not yet upgraded) can see the lun ok, yet it's status is broken as the host reports to be "unplugged" from the storage.
This is 1 of 8 luns accessible - other FC luns are ok.
No idea what to do now, so any help would be greatly appreciated!