|Article Number: 536974||Article Version: 2||Article Type: How To|
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The Host Configuration Validation Script (sometimes shortened to Host Validation Script, or HVS) is provided as a courtesy by Dell EMC, and is meant to make review of host configuration easier. In regards to an NDU, its primary most important uses are to look at host HBA timeouts and multipathing configuration. There are other important items that may be checked, though these will vary depending on the host type.
The script is a companion to the XtremIO Host Configuration Guide, and as such covers items ranging from important (preventing Data Unavailability) to minor (performance fine-tuning)
Note that our Support teams cannot perform configuration changes on hosts. If you need this kind of assistance, please reach out to your Dell EMC local team (performing host configuration may require paid services).
As a reminder, the scripts and procedures for running them can be found in the following articles:
XtremIO: Host Configuration Validation Script for ESX
XtremIO: Host Configuration Validation Script for Linux
XtremIO: Host Configuration Validation Script for Windows
There are a few items to remember when using these scripts in preparation for an NDU:
If there are any questions about HVS output that is not present here, check the XtremIO Host Configuration Guide first to see if it is answered there.
Here are some examples of items that may appear, but where the recommendation may not be clear. Note: this is NOT an exhaustive list, as most issues mentioned in the script will state what the current setting is and advise on the recommended change.
PROBLEM: No XtremIO disks found
This is typically the result of XtremIO Volumes being deleted on the storage side, but the host not being updated to reflect these changes. Since the HVS is run on the host, it tries to find the volumes but they no longer exist on the array. This failure will not cause problems during an NDU, if verified as stated above.
PROBLEM: XtremIO datastores are set with "Public" locking mode and will not work with VAAI
If this problem is seen, it MUST be resolved! See KB 485682 for more details: Increased risk of a system outage when VAAI and ATS are not enabled on hosts connected to XtremIO datastores
NOTICE: It appears the initial install of the cluster was pre XtremIO XIOS 4.X - therefore it is not possible to validate at least one live path exists to both Storage Controllers of the same XBrick
This means the script was unable to check host path redundancy to the storage. If this is seen, path redundancy will need to be manually checked on the host side.