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Therefore, the following integrated devices can be independent of each other assigned to
LPARs:
Integrated dual-channel Ultra320 SCSI controller
All SCSI resources in the disk bays, including external disks that are connected to the
external SCSI port, must be assigned together to the same LPAR. There is no requirement
to assign them to a particular LPAR; in fact, they can remain unassigned if the LPAR
minimum requirements are obtained using devices attached to a SCSI adapter installed in
the system.
Media devices connected to the IDE controller
The IDE devices can be assigned to one LPAR, independent from other resources, for
example SCSI attached devices.
Integrated dual 10/100/1000 Mbps Ethernet controller
Integrated dual USB controller
Virtual I/O devices are also assigned to dynamic LPARs on a slot level. Each partition is
capable of handling up to 256 virtual I/O slots. Therefore each partition can have up to:
256 virtual Ethernet adapters with each virtual Ethernet capable of being associated with
up to 21 VLANs.
256 virtual SCSI adapters
Note: For more detailed planning of the virtual I/O slots and their requirements, use the
LPAR validation tool.
Every LPAR requires disks (either physical or virtual) for the operating system. Systems with
internal disks are connected to the internal SCSI port. As described previously, all integrated
SCSI devices, including all internal disks, and all external devices connected to the second
SCSI port of the integrated SCSI adapter, can only be assigned to the same LPAR.
Therefore, for additional LPARs without using virtualization, external disk space is necessary,
which can be accomplished by using external disk subsystems. The external disk space must
be attached with a separate adapter for each LPAR by using SCSI or Fibre Channel adapters,
depending on the subsystem.
For additional LPARs using virtualization, the required disk drives for each partition are
provided by the Virtual I/O Server partition(s). Physical disks owned by the Virtual I/O Server
partition can either be exported and assigned to a client partition whole, or can be partitioned
into several logical volumes. The logical volumes can then be assigned to different partitions.
For the OpenPower 710 server, additional disk space can be provided by using an external
storage subsystem such as the IBM 2104 Expandable Storage Plus. For more detailed
information of the available IBM disk subsystems, refer to "External disk subsystem" on
page 25.
Every LPAR needs an Ethernet connection to the HMC. As described previously, all internal
Ethernet devices could only be assigned to the same LPAR.
Therefore, for additional LPARs without using virtualization, an additional Ethernet adapter is
necessary. As stated earlier, it is highly recommended to use separate Ethernet adapters for
connection to the management LAN and public LAN. Due to the limited number of available
PCI slots, it is recommended to use an additional 2-Port 10/100/1000Mbps Ethernet Adapter
(FC 1983) to provide physically sperated Ethernet ports to the second LPAR, without
virtualization.
32
IBM eServer OpenPower 710 Technical Overview and Introduction
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