How to Add a New Disk to an Existing Linux Server

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Lakshmi Dhandapani

I work on various platforms including IBM-AIX, Solaris, HP-UX, and storage technologies ONTAP and OneFS and have hands on experience on Oracle Database.

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28 Responses

  1. Bhargvi says:


    I need to add another hard disk in rhel7 system and wanted to create a ‘sdb’ partition. May I know how to create it?

    • Ravi Saive says:


      Follow the same procedure as explained in this article, for adding new disk to an existing RHEL 7 system..

      • Bhargavi says:

        Thank you Ravi Saive

        I need to add graphically not a command line mode…..
        In graphical mode how to add the hard disk…

        • Ravi Saive says:


          I think you can do it by using any graphical disk management utility like Gparted or any other, that you need to find out..

  2. Arun says:

    You added 20 Gb Hard disk but in fdisk it is showing 21.5 GB. HOW??

  3. Sergio Satler says:

    Thanks Lakshmi! It’s very helpful!

  4. Manush says:

    Thanks Lakshmi. It worked well for my RHEL VM.

  5. Andrew says:

    Thanks — I was able to follow this guide and get my drive installed with no headaches at all!

    It might be useful to update with instructions to change the owner of the newly assigned drive. In Ubuntu 16.04, my freshly installed drive belonged to the user `root` and the group `root`. I just had to run `sudo chown : /dev/sda1` (in Ubuntu it seems both name and group are your login name) to get write access to the drive.

  6. Matthew Broadhead says:

    In your /etc/fstab consider using the UUID instead of the automatically assigned /dev/***.
    UUID can be found using blkid.

    e.g. fstab

    UUID=******-*******-******-******	/data	ext4	defaults     0   0
  7. Håkan Franzén says:

    Hi, before the command.

    # mount /dev/xvdc1 /data

    you should add: mkdir /data (if there is no /data)

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