Figure 2.8 Mounting Conditions Of Scsi Cards And Usable Built-In I/Os (Within The Same Partition) - Fujitsu PRIMEQUEST 480 System Design Manual

Mounting conditions of SCSI cards and usable built-in I/Os
Figure 2.8
conditions of SCSI cards, and usable built-in IOs within the same partition. In the
partition shown in
IOU #1 is specified as the home IO_Unit. If a SCSI card is mounted in this partition,
it needs to be mounted in IOU #1, which has a priority rank of 1, or in IOU #0, which
has a priority rank of 2. If a SCSI port on an IO_Unit in this partition is used, IOU #1,
IOU #0, IOU #2, and IOU #3, which have priority ranks of 1, 2, 3, and 4, respectively,
can be used. If a built-in HDD is mounted in an IO_Unit in this partition, it needs to
be mounted in IOU #1, IOU #0, IOU #2, or IOU #3, which have priority ranks of 1, 2,
3, and 4, respectively.
Starting from the home IO_Unit, the IO_Units with the four smallest IO_Unit numbers can be
used for mounting HDDs and using external SCSI interfaces.
Home IOU(IOU#1)
#0
PCI_Box#0-7
PCIU#0
#0 #1 #2
PCIU#2
#0 #1 #2
Figure 2.8 Mounting conditions of SCSI cards and usable built-in I/Os
C122-B001-02EN
shows an example that explains the priority ranks of IO_Units, mounting
Figure 2.8, eight IO_Units are allocated (the SB is omitted) and
IOU #0
#1 #2 #3 #0 #1 #2
PCIU#1
#0 #1 #2
PCIU#3
#0 #1 #2
(within the same partition)
IOU #2 IOU #3 IOU #4
#3
SCSI cards can be mounted.
HDDs or external SCSI interfaces can be used.
HDDs, external SCSI interfaces, and SCSI cards
can not be mounted or used.
2.3 IO_Unit
IOU #7
IOU #5 IOU #6
Partition #N
2-17