Hello Pan,
it is so also on c7600s72033-adventerprisek9-mz.122-33.SRC.bin
and on 7206VXR with c7200p-advsecurityk9-mz.124-15.T6.bin
I found the command on GSR with disk0:c12kprp-k4p-mz.120-32.S6.bin
You may open a TAC case requesting info about when it will be supported on C7600 or C6500.
Hope to help
Giuseppe