VMs abort while cloning/creating disks with VBoxManage

[cj_tomekk]

Hello,

I'm struggling with an issue where running VMs are being aborted when there is an ongoing VBoxManage cloning or creating fixed vdi.
When operation lasts more than 2-3 minutes the VMs gets aborted. I suspect that its caused by vast HDD usage somehow. Are VMs really that sensible?
Is my guess correct or there is a different reason? How to overcome this? maybe some way to slow down / reduce disk usage while that operation?

I tried it with 4.3.* and 5.0.* versions. I use Centos 6.4 host with 2.6.32 kernel.

[mpack]

Please provide a VM log file. With the VM fully shut down, right click it in GUI. Select "Show Log" and save "VBox.log" (ONLY) to a zip file. Attach the zip here.