not sure where you got that dd command from. besides the incorrect syntax the device names are not Solaris.

if you really did use dd with the same model/drive parameters then this should have worked - however you would not really use this method on on a live system.

you can also boot over the network if you don't have the original media. you can download Solaris and create a boot server. There is plenty of documentation on how to do this.

can you freeze/lock the screen to prevent scrolling? a serial console could be handy to capture all of the messages.