VCAP5-DCA – – Implement Complex Storage Solutions – Skills and Abilities – Identify and tag SSD devices

Identify and tag SSD devices:

This is well covered in the vSphere Storage guide.

Identify an SSD: 

Before you identify an SSD device, ensure that the device is tagged as SSD.
From the CLI, the procedure is to list the devices.
esxcli storage core device list
and then review the command output includes the following information about the listed device.
Is SSD: true
Verify whether the value of the flag Is SSD is true.

From the vSphere client Host summary includes a column ‘Drive Type’ with possible values Non-SSD, SSD or Unknown (NFS datastores).

If you have an SSD that is not detected as one or you need to emulate an SSD in a lab environment you can manually tag the datastore as SSD. The process is documented In the vsphere documentation

  1. Identify the device to be tagged and its SATP.

    esxcli storage nmp device list 

  2. Add a Claim Rule to mark the device as SSD

 esxcli storage nmp satp rule add -s SATP –device device_name –option=enable_ssd

  1. Unclaim the device

esxcli storage core claiming unclaim –type device –device device_name

  1. Enable to new claim rule and load it into memory

        esxcli storage core claimrule load

        esxcli storage core claimrule run

5. Make sure that it worked
        esxcli storage core device list -d device_name

The command output indicates if a listed device is tagged as SSD.

Is SSD: true 


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