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jitbit
Asked: 2015-03-17 03:43:52 +0800 CST

How to tell if disk volume is instance store or EBS?

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I have a number of volumes (same size) attached to a Windows instance in Amazon AWS.

One of them is told to be an instance store.

How do I tell which one?

PS. testing the speed did not help, one of the drives IS slightly faster than the others but how I can be sure it's an instance store?

amazon-ec2

3 Answers

  1. Use Get-Disk command.

    For Windows 2012 command would look like:

    Get-Disk | Select Number,SerialNumber | Sort-Object Number

    For Windows 2016 command would look like:

    Get-Disk | Select Number,AdapterSerialNumber | Sort-Object Number

    If a SerialNumber is not starting as "VOL..." that disk is an instance store. You can go to "Computer Management" -> "Disk Management" to map disk Number to DrivesLetters.

    More details: https://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/nvme-ebs-volumes.html#identify-nvme-ebs-device

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  2. I have been researching this and found this page in the AWS documentation - https://aws.amazon.com/ec2/instance-types/. Only certain instances come with ephemeral storage.

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  3. Answering my own question.

    Go to "Computer management" - "disk management" - Right-click the gray pane labeled Disk 1, and then select Properties.

    Note the value of Location and look it up in the tables in Disk Device to Device Name Mapping here https://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/ec2-windows-volumes.html#windows-volume-mapping

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