Is there still anything left to do here, or could we close this ticket
nowadays?
** Changed in: qemu
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1437367
Title:
Qemu guest fails to write files with raw disk (like
\\.\PhysicalDrive1) on Windows host.
Status in QEMU:
Incomplete
Bug description:
Qemu guest fails to write files with specifing raw disk like
\\.\PhysicalDrive1
full command line is below.
qemu-sysytem-i386.exe -kernel bzImage -drive file=rootfs.ext2,index=0,if=scsi
-append root=/dev/sda -drive file=\\.\PhysicalDrive1,index=1,if=scsi
I found the reason is below aio_worker returns -EIO when flush
operation.
https://github.com/qemu/qemu/blob/master/block/raw-win32.c#L95
static int aio_worker(void *arg)
...
case QEMU_AIO_FLUSH:
if (!FlushFileBuffers(aiocb->hfile)) {
return -EIO;
}
FlushFileBuffers always fails with GetLastError() == ERROR_INVALID_FUNCTION
I think this function doesn't support raw device.
For flushing, you might have to issue scsi/ata command or use another way.
Trying to just ignoring this error, writing function seems to be fine for me.
Thanks
hiroaki
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