All of the ESX hosts on a specific fabric or connected through an ISL link
One ESX host
Targets on the storage array are visible but one or more LUNs are not
LUN not visible
LUN cannot connect
Connectivity issues to the storage array
LUN is missing
ESX host initiators are not logging into the array
You see one of these errors:
Unknown inaccessible
SCSI: 4506: "Cannot find a path to device vmhba1:0:8 in a good state"
Purpose
This article guides you through the most common steps to identify a connectivity problem to a shared storage device.
Resolution
Please validate that each troubleshooting step below is true for your environment. Each step will provide instructions or a link to a document, in order to eliminate possible causes and take corrective action as necessary. The steps are ordered in the most appropriate sequence to isolate the issue and identify the proper resolution. Please do not skip a step.
These are common items for troubleshooting connectivity issues to the storage array.
Verify that the initiator is registered on the array, and that the storage array is configured correctly. You may need to contact your storage vendor for instructions on this procedure. For more information, see the Fibre Channel SAN Configuration Guide for your version of ESX/ESXi.
Verify the physical hardware:
The storage processors on the array.
The fibre switch and the Gigabit Interface Converter (GBIC) units in the switch.
The fibre cables between the fibre switch and the array.
The array itself.
Partner with the hardware vendor to ensure that the array is properly configured.
Note: A rescan is required after any change is made to see if the targets are detected.
Note: If your problem still exists after trying the steps in this article, please:
File a support request with VMware Support and note this KB Article ID (1003680) in the problem description. For more information, see How to Submit a Support Request.
