Specifications

280 IBM Flex System p260 and p460 Planning and Implementation Guide
The minimum amount of physical memory to create a partition is the size of the
system logical memory block (LMB). The default LMB size varies according to
the amount of memory configured in the system, as shown in Table 7-1.
Table 7-1 Configured memory-to-default LMB size
Physical memory assigned to partitions is in increments of LMB.
The POWER Hypervisor provides the following types of virtual I/O adapters:
򐂰 Virtual SCSI
򐂰 Virtual Ethernet
򐂰 Virtual Fibre Channel
򐂰 Virtual (TTY) console
Virtual I/O adapters are defined by system administrators during logical partition
definition. Configuration information for the adapters is presented to the partition
operating system.
Virtual SCSI
The POWER Hypervisor provides a virtual SCSI mechanism for virtualization of
storage devices. Virtual SCSI allows secure communications between a logical
partition and the I/O Server (VIOS). The storage virtualization is accomplished by
pairing two adapters: a virtual SCSI server adapter on the VIOS, and a virtual
SCSI client adapter on IBM i, Linux, or AIX partitions. The combination of Virtual
SCSI and VIOS provides the opportunity to share physical disk adapters in a
flexible and reliable manner.
Virtual Ethernet
The POWER Hypervisor provides an IEEE 802.1Q, VLAN-style virtual Ethernet
switch that allows partitions on the same server to use fast and secure
communication without any need for physical connection.
Virtual Ethernet support starts with AIX 5L V5.3, or the appropriate level of Linux
supporting virtual Ethernet devices. The virtual Ethernet is part of the base
system configuration.
Configurable memory in the system Default LMB
Less than 4 GB 16 MB
Greater than 4 GB up to 8 GB 32 MB
Greater than 8 GB up to 16 GB 64 MB
Greater than 16 GB up to 32 GB 128 MB
Greater than 32 GB 256 MB