vrk@zen:~/vagrant/laxrac$ vagrant validate
Vagrantfile validated successfully.
vrk@zen:~/vagrant/laxrac$ vagrant up
Bringing machine 'laxrac1' up with 'virtualbox' provider...
Bringing machine 'laxrac2' up with 'virtualbox' provider...
==> laxrac1: Importing base box 'rhel7_20201117'...
==> laxrac1: Matching MAC address for NAT networking...
==> laxrac1: Setting the name of the VM: laxrac1
==> laxrac1: Clearing any previously set network interfaces...
==> laxrac1: Preparing network interfaces based on configuration...
    laxrac1: Adapter 1: nat
==> laxrac1: Forwarding ports...
    laxrac1: 22 (guest) => 2222 (host) (adapter 1)
==> laxrac1: Running 'pre-boot' VM customizations...
==> laxrac1: Booting VM...
==> laxrac1: Waiting for machine to boot. This may take a few minutes...
    laxrac1: SSH address: 127.0.0.1:2222
    laxrac1: SSH username: vagrant
    laxrac1: SSH auth method: private key
    laxrac1:
    laxrac1: Vagrant insecure key detected. Vagrant will automatically replace
    laxrac1: this with a newly generated keypair for better security.
    laxrac1:
    laxrac1: Inserting generated public key within guest...
    laxrac1: Removing insecure key from the guest if it's present...
    laxrac1: Key inserted! Disconnecting and reconnecting using new SSH key...
==> laxrac1: Machine booted and ready!
==> laxrac1: Checking for guest additions in VM...
==> laxrac1: Setting hostname...
==> laxrac2: Importing base box 'rhel7_20201117'...
==> laxrac2: Matching MAC address for NAT networking...
==> laxrac2: Setting the name of the VM: laxrac2
==> laxrac2: Fixed port collision for 22 => 2222. Now on port 2200.
==> laxrac2: Clearing any previously set network interfaces...
==> laxrac2: Preparing network interfaces based on configuration...
    laxrac2: Adapter 1: nat
==> laxrac2: Forwarding ports...
    laxrac2: 22 (guest) => 2200 (host) (adapter 1)
==> laxrac2: Running 'pre-boot' VM customizations...
A customization command failed:

["createhd", "--filename", "/home/vrk/virtualboxes/shared_disks/laxrac_asm_disk1.vdi", "--size", 16384, "--format", "VDI", "--variant", "Fixed"]

The following error was experienced:

#<Vagrant::Errors::VBoxManageError: There was an error while executing `VBoxManage`, a CLI used by Vagrant
for controlling VirtualBox. The command and stderr is shown below.

Command: ["createhd", "--filename", "/home/vrk/virtualboxes/shared_disks/laxrac_asm_disk1.vdi", "--size", "16384", "--format", "VDI", "--variant", "Fixed"]

Stderr: 0%...
Progress state: VBOX_E_FILE_ERROR
VBoxManage: error: Failed to create medium
VBoxManage: error: Could not create the medium storage unit '/home/vrk/virtualboxes/shared_disks/laxrac_asm_disk1.vdi'.
VBoxManage: error: VDI: cannot create image '/home/vrk/virtualboxes/shared_disks/laxrac_asm_disk1.vdi' (VERR_ALREADY_EXISTS)
VBoxManage: error: Details: code VBOX_E_FILE_ERROR (0x80bb0004), component MediumWrap, interface IMedium
VBoxManage: error: Context: "RTEXITCODE handleCreateMedium(HandlerArg*)" at line 510 of file VBoxManageDisk.cpp
>

Please fix this customization and try again.
vrk@zen:~/vagrant/laxrac$ ls -ltr /home/vrk/virtualboxes/shared_disks/laxrac_asm_disk*
-rw------- 1 vrk vrk 17181966336 Nov 19 12:59 /home/vrk/virtualboxes/shared_disks/laxrac_asm_disk4.vdi
-rw------- 1 vrk vrk 17181966336 Nov 19 12:59 /home/vrk/virtualboxes/shared_disks/laxrac_asm_disk5.vdi
-rw------- 1 vrk vrk 17181966336 Nov 19 12:59 /home/vrk/virtualboxes/shared_disks/laxrac_asm_disk6.vdi
-rw------- 1 vrk vrk 17181966336 Nov 19 12:59 /home/vrk/virtualboxes/shared_disks/laxrac_asm_disk1.vdi
-rw------- 1 vrk vrk 17181966336 Nov 19 12:59 /home/vrk/virtualboxes/shared_disks/laxrac_asm_disk3.vdi
-rw------- 1 vrk vrk 17181966336 Nov 19 12:59 /home/vrk/virtualboxes/shared_disks/laxrac_asm_disk2.vdi
vrk@zen:~/vagrant/laxrac$ cat Vagrantfile
# encoding: utf-8
# -*- mode: ruby -*-
# vi: set ft=ruby :

# -- define the number of nodes to spin --

N=2
cname="laxrac"

Vagrant.configure("2") do |config|
  #Iterate over the nodes
  (1..N).each do |node_id|
    nid=(node_id)
    nodename=("#{cname}#{nid}")
    config.vm.define "#{cname}#{nid}"  do |node|
      node.vm.box = "rhel7_20201117"
      node.vm.hostname = "#{nodename}"
      node.vm.synced_folder ".", "/vagrant", disabled:true
      node.vm.provider :virtualbox do |v|
        v.memory = 4096
        v.cpus   = 2
        v.name   = "#{nodename}"
        (1..6).each do |dnum|
          asmdisk = ("/home/vrk/virtualboxes/shared_disks/#{cname}_asm_disk#{dnum}.vdi")
          unless File.exist?("#{asmdisk}")
            v.customize ['createhd', '--filename', ("#{asmdisk}") , '--size', 16384, '--format', 'VDI', '--variant', 'Fixed']
          end
          v.customize ['storageattach', :id, '--storagectl', 'SATA Controller', '--port', ("#{dnum}"), '--device', 0, '--type', 'hdd', '--medium', ("#{asmdisk}"), '--mtype', 'shareable', '--nonrotational', 'on']
        end # eof dnum
      end   # eof v
    end     # eof node
  end       # eof node_id
end         # eof config
vrk@zen:~/vagrant/laxrac$