Chapter 3. Virtualization
95
Figure 3-1 Connectivity between virtual Fibre Channels adapters and external SAN devices
Virtual serial adapters (TTY) console
Virtual serial adapters provide a point-to-point connection from one logical partition to
another, the Hardware Management Console (HMC), or the Systems Director Management
Console (SDMC) to each logical partition on the managed system. Virtual serial adapters are
used primarily to establish terminal or console connections to logical partitions.
Each partition needs to have access to a system console. Tasks such as operating system
installation, network setup, and certain problem analysis activities require a dedicated system
console. The POWER Hypervisor provides the virtual console using a virtual TTY or serial
adapter and a set of Hypervisor calls to operate on it. Virtual TTY does not require the
purchase of any additional features or software such as the PowerVM Edition features.
For POWER6- or POWER7-based blades, the operating system console can be accessed
from the IVM user interface or SDMC depending on which method is being used to manage
the system, or from Serial Over LAN (SOL) through the BladeCenter Advanced Management
Module (AMM) for the LPAR or virtual server that owns the first Ethernet port. Not all methods
can be used concurrently.
Virtual I/O Server
Physical
Disk 1
Physical
Disk 2
Server virtual fibre
channel adapter
Server virtual fibre
channel adapter
Client logical
partition 2
Client virtual
fibre channel
adapter
Client logical
partition 1
Client virtual
fibre channel
adapter
Hypervisor
Physical fibre
channel adapter
Storage
Area
Network
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