4.
Cable the first SCSI bus or set of shared disks by performing the following steps:
a.
Connect the bottom port of the adapter on Host A (SCSI address 7) to the exterior port on the
repeater card in slot C2 on the enclosure.
b.
Connect the top port of the adapter on Host B (SCSI address 6) to the exterior port on the repeater
card in slot C3 on the enclosure.
This connection creates a set of shared disks and a shared SCSI bus (such as scsi0) between Host A
and Host B. The important thing to consider at this point is that you connect the cables in descending
order of the SCSI address on the host adapter. Connecting the cables in descending order of the host
SCSI address reduces the potential for conflicting addresses.
5.
Cable the second SCSI bus or set of shared disks by performing the following steps:
a.
Connect the bottom port of the adapter on Host B (SCSI address 7) to the interior port on the
repeater card in slot C5 on the enclosure.
b.
Connect the top port of the adapter on Host A (SCSI address 6) to the interior port on the repeater
card in slot C4 on the enclosure.
This connection creates a set of shared disks and a shared SCSI bus (such as scsi1) between Host A
and Host B. The important thing to consider at this point is that this is an independent SCSI bus or
set of shared disks from the first set. Ensuring that you do not mistakenly connect one of the cables
from either SCSI bus to another SCSI bus reduces the potential for conflicting SCSI addresses.
Important:
When adding, removing, or replacing SCSI adapters in host systems, you might want to
disconnect the cabling at the enclosure first and reconnect the cabling to the enclosure last. This is
because the new adapter SCSI ID default might be 7. You should ensure that the correct SCSI ID is set
for the port you are cabling.
Connecting and configuring the disk drive enclosure in a system
running Linux
Use the information in this section to perform the cabling, SCSI addressing, and postconnection
requirements for the disk drive enclosure.
Figure 16. SCSI cable to a dual repeater card that is connected with two SCSI cards
Disk drive enclosures
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Summary of Contents for Escala Power7 Series
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