Planning for Virtual Partitions
Proper
planning for vPars greatly simplifies the implementation process.
Before performing any vPar tasks, the state of the server should be
captured for future reference. At a minimum, output of the parstatus and ioscan commands should be saved or printed.
The output of parstatus, shown in Listing 1,
provides the details of the nPartition where the vPars will be created.
The nPartition's boot paths, CPU count, and memory information have
been highlighted.
Listing 1. Status of nPartition
# parstatus -V -p 6
[Partition]
Partition Number : 6
Partition Name : zoo6
Status : active
IP address : 0.0.0.0
Primary Boot Path : 6/0/6/0/0.2.0
Alternate Boot Path : 0/0/0/0/0.0.0
HA Alternate Boot Path : 0/0/0/0/0.0.0
PDC Revision : 35.3
IODCH Version : 5C70
CPU Speed : 552 MHz
Core Cell : cab0,cell6
[Cell]
CPU Memory
OK/ (GB)
Hardware Actual Deconf/ OK/
Location Usage Max Deconf Connected To
========== ============ ======= ========= ===================
cab0,cell6 active core 4/0/4 2.0/ 0.0 cab0,bay1,chassis1
[Chassis]
Core Connected Par
Hardware Location Usage IO To Num
=================== ============ ==== ========== ===
cab0,bay1,chassis1 active yes cab0,cell6 6
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Capturing the I/O configuration of the server with ioscan
is crucial because booting the vPar monitor results in limited I/O
visibility. Only the I/O information for the resources that have been
assigned to the local vPar is visible through tools such as ioscan
after the vPar monitor is booted. Creating or modifying vPars can be
difficult without a snapshot of the server's configuration before
booting the vPar monitor.
I/O
visibility is limited because the vPar monitor applies a filter to
restrict the hardware components visible to each vPar to only those
which have been assigned. Even though the I/O data being sought is for
resources that are not assigned to any vPar, the only detailed I/O
information available is for resources assigned to the local Virtual
Partition. The vparstatus command has an option to show the
available resources, but this option does not provide any I/O details
beyond the LBA level. Therefore, ioscan output such as the one shown in Listing 2
should be captured for future reference. The most relevant items are
highlighted, as they will be referenced in upcoming vPar commands.
tip
Always capture the output of ioscan
before booting the virtual partition monitor. After the vPar monitor is
booted, only resources assigned to the local vPar are visible.
Listing 2. Ioscan of nPartition before Virtual Partition Creation
# ioscan -k
H/W Path Class Description
=======================================================
root
6 cell
6/0 ioa System Bus Adapter (804)
6/0/0 ba Local PCI Bus Adapter (782)
6/0/0/0/0 tty PCI Serial (103c1048)
6/0/0/1/0 lan HP PCI 10/100Base-TX Core
6/0/1 ba Local PCI Bus Adapter (782)
6/0/1/0/0 ext_bus SCSI C87x Ultra Wide Differential
6/0/1/0/0.7 target
6/0/1/0/0.7.0 ctl Initiator
6/0/2 ba Local PCI Bus Adapter (782)
6/0/3 ba Local PCI Bus Adapter (782)
6/0/4 ba Local PCI Bus Adapter (782)
6/0/4/0/0 ext_bus SCSI C87x Ultra Wide Differential
6/0/4/0/0.7 target
6/0/4/0/0.7.0 ctl Initiator
6/0/4/0/1 ext_bus SCSI C87x Ultra Wide Differential
6/0/4/0/1.7 target
6/0/4/0/1.7.0 ctl Initiator
6/0/6 ba Local PCI Bus Adapter (782)
6/0/6/0/0 ext_bus SCSI C896 Ultra2 Wide LVD
6/0/6/0/0.2 target
6/0/6/0/0.2.0 disk HP 18.2GST318404LC
6/0/6/0/0.4 target
6/0/6/0/0.4.0 disk HP 18.2GST318404LC
6/0/6/0/0.6 target
6/0/6/0/0.6.0 disk HP 18.2GST318404LC
6/0/6/0/0.7 target
6/0/6/0/0.7.0 ctl Initiator
6/0/6/0/1 ext_bus SCSI C896 Ultra2 Wide LVD
6/0/6/0/1.7 target
6/0/6/0/1.7.0 ctl Initiator
6/0/8 ba Local PCI Bus Adapter (782)
6/0/8/0/0 ext_bus SCSI C895 Ultra2 Wide LVD
6/0/8/0/0.7 target
6/0/8/0/0.7.0 ctl Initiator
6/0/8/0/0.8 target
6/0/8/0/0.8.0 disk HP 18.2GST318406LC
6/0/9 ba Local PCI Bus Adapter (782)
6/0/9/0/0 ext_bus SCSI C895 Ultra2 Wide LVD
6/0/9/0/0.7 target
H/W Path Class Description
=======================================================
6/0/9/0/0.7.0 ctl Initiator
6/0/9/0/0.8 target
6/0/9/0/0.8.0 disk HP 18.2GST318406LC
6/0/10 ba Local PCI Bus Adapter (782)
6/0/10/0/0 lan HP A5230A/B5509BA PCI 10/100Base-TX
6/0/11 ba Local PCI Bus Adapter (782)
6/0/11/0/0 lan HP A5230A/B5509BA PCI 10/100Base-TX
6/0/12 ba Local PCI Bus Adapter (782)
6/0/14 ba Local PCI Bus Adapter (782)
6/5 memory Memory
6/10 processor Processor
6/11 processor Processor
6/12 processor Processor
6/13 processor Processor
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