VM hangs with huge I/O

[claunia]

Hi all,

I've been experiencing a strange problem.

Basically, after the guest OS is completely booted, it starts to read the virtual disk at about 1/4 of the maximum speed and gets stuck.

I've experienced it with 5 fresh installs of Windows Vista SP1 at random points in usage (right after install, in the middle of updates, after installing SP2). Each install was creating a new VDI.

I've also experienced it using a resize of a working Mac OS X 10.11 VM. Original disk image was VMDK converted to VDI by qemu-img.

The only way to stop the VM was killing them. Most of the times then the VDI gets so corrupt the VM is unable to start.

Then taking the VDI that doesn't work, and converting it to VMDK by qemu-img, and it works perfectly. (Except corrupt images, they block qemu-img also).

It doesn't seem to happen with all VDIs, other VMs have not experienced this problem. And it ONLY happens after the OS is fully loaded up to login screen or desktop.

Host disk is Samsung 850 Pro 1Tb SSD. When the VM gets stuck it goes a constant reading of ~100Mb/s (no other app accessing it).

[claunia]

Windows Vista loop log

[claunia]

Mac OS X 10.11 loop log

[Socratis]

Replying to claunia:

I've also experienced it using a resize of a working Mac OS X 10.11 VM.

00:00:06.426344 OS Product: Linux
00:00:06.426365 DMI Product Name: To be filled by O.E.M.
00:00:06.475110 Guest OS type: 'MacOS1011_64'

Are you asking for support for a Hackintosh?