Processor storage

z/OS® design supports an architectural limit of 4 TB of real memory per LPAR (where TB equals 1,099,511,627,776 bytes). The actual amount of real memory supported on IBM® servers varies. The maximum amount of real storage supported by z/OS in an LPAR is as follows (where GB equals 1,073,741,824 bytes):

zBC12: 496 GB
zEC12: 3.0 TB per server, 1 TB per LPAR
z196: 3.0 TB per server, 1 TB per LPAR
z114: 248 GB
z10™ EC: 1.5 TB per server, 1 TB per LPAR
z10 BC: 248 GB
z9® EC: 512 GB
z9 BC: 64 GB

To run z/OS as a guest under z/VM®, the minimum release of z/VM required is V5.4.

Note:

The minimum real storage requirements to IPL z/OS V2R1 will be documented on the z/OS Installation Web page at GA http://www-03.ibm.com/systems/z/os/zos/installation/.