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Virtual I/O Server
Physical Disk
(SCSI, FC)
Logical
Volume 1
VSCSI
Server
Adapter
Figure 3-12 Architectural view of virtual SCSI
At the time of writing, virtual SCSI supports Fibre Channel, parallel SCSI, iSCSI, SAS, SCSI
RAID devices, and optical devices (including DVD-RAM and DVD-ROM). Other protocols
such as SSA and tape devices are not supported.
For more information about the specific storage devices supported for VIOS, see the
following web page:
http://www14.software.ibm.com/webapp/set2/sas/f/vios/documentation/datasheet.html
VIOS functions
VIOS includes a number of features, including monitoring solutions, as follows:
Support for Live Partition Mobility on POWER6 and POWER7 processor-based systems
with the PowerVM Enterprise Edition. For more information about Live Partition Mobility,
see 3.4.6, "PowerVM Live Partition Mobility" on page 112.
Support for virtual SCSI devices backed by a file. These are then accessed as standard
SCSI-compliant LUNs.
Support for virtual Fibre Channel devices used with the NPIV feature.
VIOS Expansion Pack with additional security functions such as Kerberos (Network
Authentication Service for users and Client and Server Applications), SNMP v3 (Simple
Network Management Protocol), and LDAP (Lightweight Directory Access Protocol client
functionality).
The Workload Estimator, designed to ease the deployment of a virtualized infrastructure.
IBM Systems Director agent and a number of IBM Tivoli Management agents are
included, such as Tivoli Identity Manager (TIM) and Tivoli Application Dependency
Discovery Manager (ADDM).
vSCSI eRAS.
Client Partition 1
Physical
Adapter
LVM
Logical
Hdisk
Volume 2
VSCSI
VSCSI
Server
Client
Adapter
Adapter
POWER Hypervisor
Client Partition 2
Hdisk
VSCSI
Client
Adapter
Chapter 3. Virtualization
111
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