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Pablote
Asked: 2019-09-30 13:45:22 +0800 CST

How to know which partition/volume is which EBS volume?

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On an EC2 instance, I have a few partitions that look like these:

/dev/nvme1n1     15G   48M   15G   1% /data/mongo2
/dev/nvme2n1     15G  4.7G   11G  32% /data/docker
/dev/nvme3n1     15G  3.4G   12G  23% /data/mongo

And then the corresponding EBS volumes, one of which looks like this:

enter image description here

I'm trying to figure out which mounts map to which EBS volumes. It used to be the case that the "Attachment information" matched or was similar to the device, but it no longer seems to be the case with nve.

Is there any way to match these besides keeping track myself of the mounts? thanks

amazon-web-services

1 Answers

  1. Best Answer

    There are a few different methods depending on what OS you're using.

    With Amazon Linux AMI 2017.09.01 or later (including Amazon Linux 2), you can run the ebsnvme-id command as follows to map the NVMe device name to a volume ID and device name

    sudo /sbin/ebsnvme-id /dev/nvme1n1

    Which will provide output like this:

    Volume ID: vol-01324f611e2463981
    /dev/sdf

    For Linux kernels 4.2 and later you can do the following:

    First, install nvme-cli. It is the NVMe command line package. Next you can run a command similar to this:

    sudo nvme id-ctrl -v /dev/nvme1n1

    NVME Identify Controller:
    vid : 0x1d0f
    ssvid : 0x1d0f
    sn : vol01234567890abcdef
    mn : Amazon Elastic Block Store
    ...
    0000: 2f 64 65 76 2f 73 64 6a 20 20 20 20 20 20 20 20 "/dev/sdf..."

    The links below provide additional details.

    References

    NVME EBS Volumes
    How to Find EBS Volume ID for NVME Volume

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