Techniques are provided for performing a copy operation. A fast reverse
restore command indicating a new source and a new target is received,
wherein the new source is an original target and the new target is an
original source. A synchronous scan is performed on the new target. A new
target structure associated with the new target is updated using a new
source structure associated with the new source.Techniques are also
provided for performing a copy operation in which a fast reverse restore
command is received after an instant virtual copy has been performed from
a new target to a new source and wherein the fast reverse restore command
is performed before a background copy has been performed by the instant
virtual copy.