weizhouapache commented on issue #7316:
URL: https://github.com/apache/cloudstack/issues/7316#issuecomment-1460731194

   @swhitman0 
   I did a bunch of testing on cloudstack 4.18, and got the following results
   1. register 4.17.2 systemvm template as a normal template
   - create a vm . detach volume when it is booting, failed with error message
   `
   Failed to detach volume DATA-14 from VM debian11; 
com.cloud.exception.InternalErrorException: Could not detach volume after 
sending the command and waiting for [10000] milliseconds. Probably the VM does 
not support the sent detach command or the device is busy at the moment. Try 
again in a couple of minutes.
   `
   
   tried again, and got a different error
   `
   Failed to detach volume DATA-14 from VM debian11; 
org.libvirt.LibvirtException: internal error: unable to execute QEMU command 
'device_del': Device virtio-disk1 is already in the process of unplug
   `
   
   Got the same error when the vm is booted into login screen.
   
   - create a vm, wait till the login screen appear.
   succeed to detach volume
   
   2. register 4.18.0  systemvm template as a normal template
   the results are same as 4.17.2 systemvm template
   
   
   I have also tested 4.17.2 systemvm template on 4.17.2 environment, the 
results are almost same except the different error message.
   
   considering everything works fine on centos7, I think it is an issue with 
rocky8/libvirt/qemu, not cloudstack. cc @swhitman0 


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