Ticket #11421 (closed enhancement: wontfix)

Opened 5 years ago

Last modified 3 years ago

Ability to preallocate a certain amount of disk space on a dynamically allocated virtual hard drive

Reported by: iamhappycoder Owned by:
Priority: minor Component: GUI
Version: VirtualBox 4.2.6 Keywords:
Cc: Guest type: all
Host type: all


When creating virtual hard drives, it would be nice if a certain amount of disk space can be specified to be preallocated or initialized so that initial disk utilization would be a bit faster.

I noticed on dynamically allocated virtual hard drives, installing any OS takes longer than if I were using fixed size virtual hard drive.

This may no longer be true when using SSDs, but it would be a few more years before SSDs are as affordable and high capacity as today's HDDs.

So if I know that an OS install would take up 3.5G, I would create a 20GB dynamically allocated hard drive but set about 5GB of pre initialized space.

Change History

comment:1 Changed 3 years ago by frank

  • Status changed from new to closed
  • Resolution set to wontfix

I don't think this request makes much sense. Either allocate the complete disk or don't, but there is no 3rd choice. Even if we would decide to allocate a certain amount of disk sectors, how many would that be? And how can you be sure that the guest will use the pre-allocated sectors and not start the disk allocation at random sectors?

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