An innovation on the J models of the 3090s is that up to two Processor/Resource features are available on the J and JH models, one per processor complex side, but if the capability is implemented on a 3090 multiprocessor, it must be installed on each side to maintain symmetry. With Processor Resource/System Manager installed, two or three modes of operation are available. System/370 mode if it’s provided on the model, ESA/370 mode, and Logically Partitioned mode. When the last is selected, the following numbers of partitions are available: 110J, 120J, 150J, 170J, and 250J have four logical partitions, and the last three can have eight logical partitions when physically partitioned; 150JH, 170JH, 180J, 200J, 300J, 250JH and 280J have seven logical partitions; and the 380J, 400J, 500J, and 600J have 14 logical partitions when physically partitioned. There is also a capability to define a second System/370 channel set in a logical partition on Models 150JH, 170JH, 180J, 200J, 250JH, 280J, and above. This enables two System/370 channel sets to be defined to MVS/370, VM/SP, or VM/SP HPO multiple central processor configurations. Each channel set can have up to 16 channels for VM/SP or MVS/370, and up to 32 channels for VM/SP HPO. On other J models one channel set of up to 16 channels is supported in each System/370 mode logical partition. Resource capping capability enables an operator to limit central processor resource to any or all logical partitions, and a specific maximum usage is assigned to a logical partition and is maintained by the system. Dynamic Storage Reconfiguration enables central and expanded storage to be added or removed from a logical partition. This capability will be available on the 180J, 200J, 280J, and above, and the JH models. Processor Resource/System Manager security strengthens the separation between operating systems running in logical partitions, and the new logical partition security display frame provides a 3090 S, J, or JH system operator with additional management options. It is also enhanced with the capability to run VM/XA SP Release 2 in a logical partition with production-level performance, for CMS-intensive environments, on the 180J, 200J, 280J, and above and all JH models. Also supported is enhancement for Multiple Preferred Guests of VM/XA System Product when operating in ESA/370 mode. Security, auditibility, and control enhancements on ES/3090 J and JH models include key-controlled storage protection; low address storage protection; storage error checking and correction; parity and other internal error checking; segment protection; block multiplexer channel command retry; and clear reset of registers and main storage.
