A Power 770 MMD with two CEC enclosures 256GB of memory, and PCIe expansion drawers with SAS disk is
being upgraded to a Power E870.
Which of the following is a valid process to leverage the existing client investment and maintain the existing
serial number?

A.
Remove expansion drawers.
Perform an MES upgrade of the memory and processor to POWER8.Migrate disk to the E870 system nodes.

B.
Remove expansion drawers.
Add EXP24S.
Perform an MES upgrade of the memory and processor to POWER8.

C.
Migrate expansion drawers.
Perform an MES upgrade of the memory and processor to POWER8.

D.
Migrate expansion drawers.
Migrate disk.
Perform an MES upgrade of the memory and processor to POWER8.

Explanation:
The following features that are present on the current system can be moved to the new
system if they are supported in the Power E870 and E880:
Disks (within an EXP24S I/O drawer)
SSDs (within an EXP24S I/O drawer)
PCIe adapters with cables, line cords, keyboards, and displays
Racks
Doors
EXP24S I/O drawers
For POWER7+ processor-based systems that have the Elastic CoD function enabled, you must reorder the
elastic CoD enablement features when placing the upgrade MES order for the new Power E870 or E880
system to keep the elastic CoD function active. To initiate the model upgrade, the on/off enablement features
should be removed from the configuration file before the MES order is started. Any temporary use of
processors or memory owed to IBM on the existing system must be paid before installing the Power E870 or
E880.
IBM Power Systems E870 and E880 Technical Overview and Introduction, page 28
http://www.redbooks.ibm.com/redpapers/pdfs/redp5137.pdf