Datasheet
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results for IBM i directly attached to DS5300 system are in Chapter 5.1.2 of the Performance
Capabilities Reference manual at: http://www-
03.ibm.com/systems/resources/systems_power_software_i_perfmgmt_pcrm_apr2011.pdf.
10.4 Sizing and configuration
There are two main sources of sizing information when planning a configuration involving IBM i
directly accessing DS5100 or DS5300 systems: the Disk Magic sizing tool and the Performance
Capabilities Reference manual mentioned in the previous chapter. It is recommended to use
them jointly. While there is not yet a direct attachment model for IBM i with DS5100 or DS5300
system in Disk Magic, the existing VIOS model can still be used to determine the physical storage
configuration, such as number of physical drives, number and type of RAID arrays and amount of
cache. At the same time, the Performance Capabilities Reference manual offers some excellent
suggestions on the number of LUNs and paths to use based on the I/Os per second and
throughput required. Note that the optimal number of LUNs for IBM i direct attachment is
significantly higher than that for VIOS attachment; typically 64 or 128 in the direct case.
Configuration of IBM i direct attachment to DS5100 and DS5300 systems can be divided into two
general steps:
Storage and SAN zoning configuration
Power server hardware and LPAR configuration
To configure the DS5100 or DS5300 systems, refer to the IBM Midrange System Storage
Hardware Guide (SG24-7676) from IBM Redbooks available at:
http://www.redbooks.ibm.com/abstracts/sg247676.html?Open, while following the best practices
and limitations outlined in the previous section of this paper. When creating a host for direct IBM i
attachment on the storage subsystem, the host type should be IBM i. To configure the SAN
fabric, follow the instructions from your FC switch manufacturer.
To create the IBM i LPAR and assign the FC adapters to it, follow the instructions in the Logical
Partitioning Guide, available at:
http://publib.boulder.ibm.com/infocenter/systems/scope/hw/topic/iphat/iphat.pdf.
For SDMC refer to the IBM Redbooks IBM Systems Director Management Console: Introduction
and Overview at: http://www.redbooks.ibm.com/abstracts/sg247860.html?Open