Re: [Qemu-discuss] how use qemu device_add and drive_add

[Dale R. Worley]

> From: "liang" <address@hidden>

> add device use:
> 1  drive_add 0 file=hotplug.raw,if=none,id=usb_disk1
> 2  device_add usb-storage,drive=usb_disk1,id=usb_disk11,removable=on‍
> 
> and del device use:
> 3  drive_del  usb_disk1‍
> 4  device_del  usb_disk11‍
> 
> but when command 4 the qemu allways "assertion failed: (obj->ref ==
> 0)‍" receive SIGABRT.‍

I expect that you must perform commands 3 and 4 in the reverse order:

  device_del usb_disk11
  drive_del usb_disk1

because the existence of usb_disk11 requires the existence of
usb_disk1.

I expect that if you attempt to delete usb_disk1 while usb_disk11
exists, then either (a) both usb_disk1 and usb_disk11 are deleted, or
(b) the attempt to delete usb_disk1 fails because usb_disk1 is "in
use".

But I am a novice with Qemu.

Dale