[Virtual Media] Best practices for ISO download status.

Hi Jeff,

I'm trying to verify the Virtual Media and a problem occurred (ISO download times out).
Since there is no standard Redfish message, I came here to learn how to implement it in this situation.


Precondition:
  1) Our Redfish Service only supports Upload TransferMthod.
  2) The network connection/traffic between Redfish and HTTP Service is unstable.

Service Architecture:
  1) User inserts VirtualMedia by posting data to "/redfish/v1/Managers/{ManagerId}/VirtualMedia/{VirtualMediaId}/Actions/VirtualMedia.InsertMedia"
{
"Image": "http://192.168.1.1/bootimage.iso",
"Inserted": true
}  2) The background process will download the ISO file from the remote HTTP service and save it to the internal storage.
  3) After the download is complete, mount the ISO to the host system.


Questions:
  1) How to indicate status when downloading ISO?
    If the ISO size is large, it will take a long time to download the ISO because we only supports Upload TransferMthod.
    My proposal is to use the "Inserted" property to indicate whether the virtual device is ready.
    In other words, { "ImageName": null, "Inserted": false} means that the ISO is being downloaded.
  2) How to indicate the error status of download timeout?
    Due to the unstable connection between Redfish and HTTP Service, download timeout problems sometimes occur.  
    But there is no standard Redfish Message to describe this, do you have any suggestions?


Thanks.

How to indicate status when downloading ISO