Search the VMware Knowledge Base (KB)
View by Article ID

Identifying Fibre Channel, iSCSI, and NFS storage issues on ESX/ESXi hosts (1003659)

  • 17 Ratings

Symptoms

  • No targets from an array can be seen by:
    • All of the ESX/ESXi hosts
    • All of the ESX/ESXi hosts on a specific connection or LUN
    • One ESX/ESXi 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
  • ESX/ESXi host initiators are not logging into the array
  • The share cannot be mounted by the ESX/ESXi host
  • The share is mounted, but nothing can be written to it
  • You see one or more of the following errors:
    • Unknown inaccessible
    • SCSI: 4506: Cannot find a path to device vmhbax:x:x in a good state
    • WARNING: LVM: 4844: vmhbaH:T:L:P detected as a snapshot device. Disallowing access to the LUN since resignaturing is turned off.
    • Date esx vmkernel: Time cpu3: 10340 SCSI: 5637: status SCSI LUN is in snapshot state, rstatus 0xc0de00 for vmhbax:x:x. residual R 999, CR 8-, ER3
    • Date esx vmkernel: Time cpu3: world ID SCSI 6624: Device vmhbax:x:x. is a deactivated snapshot

Purpose

This article helps you identify problems related with the storage subsystem of ESX/ESXi.

Resolution

Troubleshooting ESX host storage issues begins with identifying how far reaching (the scope) the problem is. In many cases, a detected problem may be misidentified until the scope has been ascertained.
 
To identify the scope of the problem:
  1. Verify that the storage device cannot be seen by any or a subset of the ESX cluster. If so, select the appropriate storage technology:

  2. Verify that no more than a single ESX host cannot see the shared storage. If so, select the appropriate storage technology:

  3. Verify that the LUN is presented and available. For more information, see Troubleshooting LUN connectivity issues (1003955)
     
  4. Verify that the ESX host cannot see the datastore:

Additional Information

Troubleshooting flow chart:
 
 

Tags

shared-storage  storage-connectivity  iscsi-connectivity  nfs-connectivity  fibre-channel-connectivity  lun-connectivity

See Also

Update History

05/18/2012 - Updated for 5.x.

Request a Product Feature

To request a new product feature or to provide feedback on a VMware product, please visit the Request a Product Feature page.

Feedback

  • 17 Ratings

Did this article help you?
This article resolved my issue.
This article did not resolve my issue.
This article helped but additional information was required to resolve my issue.

What can we do to improve this information? (4000 or fewer characters)




Please enter the Captcha code before clicking Submit.
  • 17 Ratings
Actions
KB: