HSCLB505 The partition cannot use hardware-accelerated encryption

When migrating LPARs using LPM onto a somewhat older hardware, the following error can occur:

HSCLB505 The partition cannot use hardware-accelerated encryption on the destination managed system because the destination managed system does not support hardware-accelerated encryption.

This means that hardware-accelerated encryption is activated for the LPAR, but is not supported on the destination managed system.

Disabling hardware-accelerated encryption using the LPAR-Tool is easy:

$ lpar -d chmem lpar01 hardware_mem_encryption=0
$

Without the LPAR-Tool this is of course also possible. Log into your HMC and use the following command from the commandoline:

chhwres -m ms01 -r mem -o s -p lpar01 -a 'hardware_mem_encryption=0'

Afterwards validation and migration using LPM should work.

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