Prepares HDDs for HDFS or Mesosphere DC/OS or any other clustered environment.

prepare_grid.sh

# WARNING: THIS SCRIPT DESTROYS DATA WITH NO QUESTIONS ASKED!
# disks are /dev/sdb - /dev/sdj - fix for your situation
for d in {b..j};
  do
    # convert letters b..j to numbers 0..8
    dnum=$(python -c "print(ord('${d}')-97)")
    disk="/dev/sd${d}"
    umount ${disk}1
    mount_point="/dcos/volume${dnum}"
    disk_label="grid0${dnum}"
    # apply GPT partition table
    sudo parted -s ${disk} mklabel gpt
    # on each disk create 1 partition with 1MiB alignment 
    sudo parted -s -a optimal ${disk} mkpart ${disk_label} '1024KiB' '100%'
    # some tuning for hdfs and big files
    sudo mkfs.ext4 -F -T largefile -m 0 -O dir_index,extent,sparse_super -L ${disk_label} ${disk}1
    # force fsck
    sudo e2fsck -f ${disk}1
    # create a mount point
    sudo mkdir -p ${mount_point}
    # add new entry to fstab
    echo -e "LABEL=${disk_label}\t${mount_point}\text4\tdefaults,data=writeback,noatime\t1\t2" | sudo tee -a /etc/fstab
    # mount a new entry
    sudo mount -a
    # remove all the garbage from fsck and make it clean
    sudo rm -rf ${mount_point}/*
  done