Compact breaks hdd (vdi)

[wat]

5.1.26
procedure followed


http://archive.is/UoVyT
sudo dd if=/dev/zero | pv | sudo dd of=/bigemptyfile bs=4096k
sudo rm -rf /bigemptyfile

VBoxManage.exe modifymedium disk c:\path\to\thedisk.vdi --compact

Ubuntu 17.04 32bit guest now can't get past the login password, simply blanks, and the asks again.

so perhaps the issue still persists.

[socratis]

I split your post from the "Resize breaks hdd (vdi)" because you didn't even do a "resize", you did a "compact" operation. I also changed the title to reflect that fact. Piggybacking on someone else's thread is not a great idea...

I'm not sure who gave you that procedure to "zero out" files in the guest, but the proper procedure is described in the User Manual, ch. 8.23 VBoxManage modifymedium in the "--compact" section.

For my Linux guests I boot from the System Rescue CD and I use the 'zerofree' command.