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Knowledge Base

Troubleshooting fibre channel storage connectivity (1003680)

Last Updated: 6/30/2023Categories: TroubleshootingTotal Views: 32961Language:
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Learn how VMware Skyline Advisor and Skyline Health Diagnostics work together to provide proactive intelligence and self-service log analysis.

Use Skyline Advisor to avoid issues before they occur across VCF, vSphere, vSAN, NSX, vROps & Horizon. Skyline Findings are based on top KBs, VMSAs/CVEs and design best practices.

Use Skyline Health Diagnostics to root cause vSphere & vSAN logs when an issue occurs. Skyline Health Diagnostic Findings are based on top KBs and VMSA/CVEs. You can use the Skyline Health Diagnostics tool in online or offline mode.

If you require additional help from technical support, please use Skyline Advisor to initiate a Log Assist to reduce time to upload logs. TSEs can also initiate logs to reduce effort.

Symptoms

No targets from an array can be seen by:

All of the ESXi hosts

All of the ESXi hosts on a specific fabric or connected through an ISL link

One ESXi host

Targets on the storage array are visible, but one or more LUNs are not visible

LUN not visible

LUN cannot connect

Connectivity issues to the storage array

LUN is missing

ESX/ESXi 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

Validate that each troubleshooting step below is true for your environment. Each step provides 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. Do not skip a step.

To troubleshoot connectivity issues to the fiber channel storage array:

Verify that none of the hosts can see any targets in a shared storage environment. For more information, see Obtaining LUN pathing information for ESXi hosts (1003973) and Identifying Fibre Channel, iSCSi, and NFS issues on ESX/ESXi hosts(1003659).

Verify that a rescan does not restore visibility to all the targets or brings all the LUNs back. For more information, see Performing a rescan of the storage on an ESXi host (1003988).

Verify the connectivity to the LUNs. For more information, see Troubleshooting LUN connectivity issues (1003955).

Verify that the fibre switch zoning configuration permits the ESXi host to see the storage array. Consult your switch vendor if you require assistance.

Verify that the fibre switch propagates RSCN messages to the ESXi hosts.

Verify that the storage array is listed in the VMware Hardware Compatibility Guide. For more information on confirming hardware compatibility, see Confirming ESX/ESXi host hardware (System, Storage and I/O) compatibility (1003916).

Note: Some array vendors have a minimum microcode/firmware version that is required to work with ESX. Consult your array vendor.

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.

Notes:

A rescan is required after any change is made to see if the targets are detected.

If your problem still exists after trying the steps in this article:

Gather VMware Support log bundles. For more information, see Collecting Diagnostic Information in a VMware Virtual Infrastructure Environment (1003689).

File a support request with VMware Support and note this Knowledge Base article ID (1003680) in the problem description. For more information, see How to File a Support Request.

Related Information

"An error occurred while consolidating disks:" deleting one or more snapshots or consolidate disks
Identifying Fibre Channel, iSCSI, and NFS storage issues on ESX/ESXi hosts
ファイバ チャネル ストレージ接続のトラブルシューティング
排除光纤通道存储连接故障
"Host Connectivity Degraded in ESXi" warning in vCenter Server

Detectable by VMware SkylineTM

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