Both primary and recovery site storage controls must be of the
same type (peer to peer).
Example: If the primary site
storage control is an IBM® Enterprise Storage Server® (ESS), the recovery site storage control must also be
an ESS.
For ESS, the appropriate features must be enabled and licensed microcode installed.
PPRC allows the use of Fibre Channel Protocol (FCP) or ESCON® connections between your
primary and secondary subsystems depending on the capabilities of
the storage subsystem. The ESCON connections
can be direct fiber optic connections or through ESCON Directors. The FCP connections can also
be direct or through fibre channel switch.
PPRC-capable Licensed Internal Code (LIC) must be installed on
both the primary and secondary storage subsystems. The levels
of PPRC LIC on the systems must be compatible.
A compatible secondary volume must be available for each primary
volume you need to copy. The secondary volume must have the identical
track capacity and number of tracks per cylinder and either the same
or larger volume capacity.
PPRC secondary devices located
in an alternate subchannel set must:
Have the same 4-digit device number as the associated PPRC primary
device in subchannel set 0
Be defined as 3390D devices in the I/O configuration using HCD.