[Qemu-discuss] qemu storage windows issue

[Benoit]

Hi,

-virtio-win-0.1.102.iso
-host archlinux / qemu 2.4.1 / kvm
-guest windows 7 pro x64
-qemu-img create -f raw en_x64_windows_7_ipc2_storage_75 75G

-drive 
file=/srv/qemu/vm/en_x64_windows_7_ipc2_storage_75,if=virtio,cache=none,format=raw,discard=unmap 


My D: drive (74GB) has 2x 32GB files used for a program to store data.
 

I realized that my product starts doing FIFO (erasing old data to be 
able to write fresh data) as soon as the space used is more than 4GB. It 
is like I got the same limitation than a FAT drive, my product detects 
that the disk is full as soon as more than 4GB are used on the disk.

Do you have any idea to help me ?

Many thanks

belette