Ticket #4650 (closed defect: duplicate)
SATA emulation seems to ignore the flush() request
|Reported by:||javaboyuk||Owned by:|
The SATA emulation seems to ignore the flush() request to the drives both RAW and file based.
This leads to DATA LOSS (and filesystem loss) this is espically dangerous for Filesystems that are transcationally based eg ZFS. This can lead to loss of the whole filesystems. It could also be the cause of a number of issues with journalled filesystems(NTFS ext3 etc).
When the guest calls the flush() call the emulation should call the hosts underlying flush() for the virtual or RAW disk.
For the discusion on ZFS you might look at this http://www.opensolaris.org/jive/thread.jspa?threadID=108213&tstart=0 and this for the IDE discusion: http://forums.virtualbox.org/viewtopic.php?f=8&t=13661&start=0
(the IDE emulation also does this but, I believe, can have it disbaled with:VBoxManage setextradata VMNAME "VBoxInternal/Devices/piix3ide/0/LUN#[x]/Config/IgnoreFlush" 0 )