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(VERR_PDM_MEDIA_LOCKED) error on Ubuntu 19.04 while installing VirtualBox Guest Additions


Start the Virtualbox Ubuntu VM, then follow the below steps:

1) To download the VirtualBox Guest Additions from the link:

"http://download.virtualbox.org/virtualbox/"

Open the terminal - type below command:

wget http://download.virtualbox.org/virtualbox/6.1.0_BETA1/VBoxGuestAdditions_6.1.0_BETA1.iso

2) Go to Devices - Insert Guest Additions CD image...

If you get following error:

unable to mount the CD/DVD image
/usr/share/virtualbox/VBoxGuestAdditions.iso on the machine Sandbox. Would you like to force mounting of this medium?

Could not mount the media/drive
'/usr/share/virtualbox/VBoxGuestAdditions.iso'
(VERR_PDM_MEDIA_LOCKED).

3) Go to Devices - Optical Drives - Remove Disk from Virtual Drive

4) Now, you can install guest additions by following same step 2:
Go to Devices - Insert Guest Additions CD image...

Pankaj

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