markovdi, thank you for your help!
We tried to do as you said - go to copy specification options > source > select device with GW2 > change > select device with GW1.
But the copy session fails with the mount request for medium from the GW2.
At the begning of the copy session we saw warning:
The library "<name_of_GW1>" does not contain the media set to perform the requested operation.
And after some time:
Mount request for medium:
MediumId : meduim_id_from_GW2
Label : label_of_media_pool_from_GW2
Location :
Device : name_of_GW1
Host : name_of_GW1_host
Slot : some numbers of slot in GW1.
We thought that this setting will tell GW1 to read data from GW2 and write it through GW1, but looks like it works in another way.
Now it seems that the only way is to switch all specs to GW1.
