The No Target Read -notgtread option has been specified, and the pair is not in full-duplex mode. For the host server to read the volume, the Remote Mirror and Copy volume pair must be in full-duplex mode.
Place the pair in full-duplex mode, and then resubmit the command. You can use the -mode full option to place the Remote Mirror and Copy volume pair in full-duplex mode.
Tip: Enter "help command_name" for more information.