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SMART drive data now available using vSAN Management 6.6 API

04.19.2017 by William Lam // 1 Comment

One of the major storage enhancements that was introduced in vSphere 5.1 as part of the new I/O Device Management (IODM) framework was the addition of SMART (Self Monitoring, Analysis And Reporting Technology) data for monitoring FC, FCoE, iSCSI, SAS protocol statistics, this is especially useful for monitoring the health of an SSD device. Historically, there was not a public vSphere API to consume this information and customers had to rely on ESXCLI which is not very friendly from a programmatic standpoint.


One of the nice enhancements that was introduced in vSAN 6.6 from an API standpoint is that you can now access SMART data using the vSAN Management 6.6 API. The other really cool thing about this enhancement is that although this API was added under the vSAN Management API, you do not actually have to be using vSAN to be able to use this new API!

There are two methods in which you can access the SMART data:

  • vCenter Server - When connecting to a vCenter Server, you can access the VsanQueryVcClusterSmartStatsSummary() method which is available as part of the VsanVcClusterHealthSystem and you simply just provide it the name of a vSphere Cluster.
  • ESXi Host - When connecting directly to an ESXi host, you can access the VsanHostQuerySmartStats() method which is available as part of the HostVsanHealthSystem.

To demonstrate how these two new APIs work, I have create two sample scripts: vsan-smarts-data-sample.py using vSAN Management SDK for Python and VSANSmartsData.ps1 using the new PowerCLI Get-VsanView cmdlet.

Here is an example of running the python sample:

python vsan-smarts-data-sample.py -s 192.168.1.200 -u '*protected email*' -p 'VMware1!' -c VSAN-Cluster


Here is an example of running the PowerCLI sample:

Get-VSANSmartsData -Cluster VSAN-Cluster

Categories // Automation, ESXi, PowerCLI, VSAN, vSphere 6.5 Tags // esxcli, PowerCLI, pyVmomi, SMART, ssd, VSAN 6.6

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William Lam is a Senior Staff Solution Architect working in the VMware Cloud team within the Cloud Infrastructure Business Group (CIBG) at VMware. He focuses on Cloud Native, Automation, Integration and Operation for the VMware Cloud based Software Defined Datacenters (SDDC) across Private, Hybrid and Public Cloud

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