CHAPTER 5 Partitioning
5.2 Physical Partitioning (PPAR)
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FIGURE 5.3 Conceptual diagram of the partitioning (PRIMEQUEST 2800E3/2800E2/2800E)
5.2.1 Partition granularity
Partition granularity refers to the smallest unit of the components making up a partition.
The names that indicate granularity include SB, Memory Scale-up Board, IOU, DU and PCI_Box. The
following table lists the partition granularity of the components that constitute a partition.
TABLE 5.2 Partition granularity of components making up a partition (PPAR)
Name indicating
granularity
Minimum unit
SB
One physical SB
Memory Scale-up
Board
One physical Memory Scale-up Board
IOU
One physical IOU
DU
Physical DU divided in two (Two HDDs/SSDs)
PCI_Box
Physical PCI_Box divided in two (Six slots)
SB partition granularity
The partition granularity of the SB is one physical SB.
Memory Scale-up Board partition granularity
The partition granularity of the Memory Scale-up Board is one physical Memory Scale-up Board.
IOU partition granularity
The partition granularity of the IOU is one physical IOU.
DU partition granularity
The partition granularity of the DU is a physical DU divided in two. Since four HDDs can be installed in each
physical DU, the partition granularity of the DU is two HDDs.
TABLE 5.3 Relationship between DU and IOU connection
IOU
Connected PCI Express slot /DU
IOU#0
PCI Express slot #0/DU#0
IOU#1
PCI Express slot #1/DU#0
IOU#2
PCI Express slot #0/DU#1
IOU#3
PCI Express slot #1/DU#1
PCI_Box partition granularity
PCI_Box partition granularity is a physical PCI_Box divided into two. The partition granularity of the PCI_Box
is called the PCI_Box LH. The PCI_Box LH is a PCI_Box divided into two.
One PCI_Box LH can be connected to one IOU. The PCI_Box LH belongs to the connected IOU. In other
words, the PCI_Box LH is incorporated in the partition to which the connected IOU belongs. The connection
between IOU can PCI_Box is optional. For details, see ‘
