(ref: vbox forums, discard support) īoot the VM up, and verify that TRIM support is enabled: sudo hdparm -I /dev/sda | grep TRIM At this time discard is not in the GUI, but nonrotational is exposed as the "Solid-state Drive" checkbox. With VBox exited and no VMs running, add discard support to your disks by setting both discard and nonrotational for each disk in the config file for the VM. In theory, this will work for all Linux guests on VBox hosts using VDI storage.
#MAC OS X VIRTUALBOX IMAGE VDI MAC OS X#
Mac Os X Version 10.10.0 Mac Os X 10.6. I couldn’t boot up the Mac Installer DVD from the virtual machine.
#MAC OS X VIRTUALBOX IMAGE VDI HOW TO#
The Arch Linux wiki has information about TRIM and dm-crypt devices. There are a few good articles explaining how to install Mac OS X on VirtualBox and a lot of people had reported success: But unfortunately, when I try to install on my Lenovo ThinkPad X201 with Core i5 M520 CPU, none of those guide worked. The Arch Linux wiki has a list of filesystems supporting TRIM operations.įDE and cryptoroot are specifically not covered, as there are security concerns and none of the other solutions to this question would allow compacting either. This solution requires a guest filesystem that supports continuous TRIM. Instead of periodically compacting the image, this solution uses discard to automatically remove unused blocks in the host's VM disk image. This isn't a direct answer per se, as I'm addressing the problem, not the question. I left the links in the comments so you can (sort of) tell how it works.Įdit Well, after all that, I tried the CloneVDI tool and it did a good job in much less time and in one click.ĭebian guest on Windows host using discard/TRIM. "C:\Program Files\Oracle\VirtualBox\VboxManage.exe" modifyhd "%%G" -compact ) :: Notice that within the for loop we use !variable! instead of %variable%. Title Compacting Free space on Virtual Machine VMs :: First run the sdelete -z c: inside the VMs that zero-out all the free space :: but that page says to use sdelete -s which is suboptimal. :: How can I reduce the size of a dynamic VDI on disk? I'm on a Windows 7 host with Windows guests, Here is a batch file I wrote to Compact all of the VDIs in a folder tree echo off
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