Deal with Disk using parted

Remove partition table:

      dd if=/dev/zero of=/dev/<<sdb>> bs=512 count=1

Replace the <<sdx>> with a real disk, such as sdb, sdc, etc

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Create partition table: Using sdb as an example

    parted /dev/sdb
    mklabel gpt

Which create gpt partition table

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Create a partition from the begining sector with exact size in GB

    parted /dev/sdb
    unit GB
    mkpart logical ext4 0% 40

These commands will create a partition sized 40GB from the beginning sector using ext4
file system

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Create ext4 file system on a parition:

     mkfs.ext4 /dev/sdb1

Give partition a name:

     name 1 space1
     name 2 space2