IBM 2073-700, Quick Installation Manual

Page: 20 / 82

If you are installing a control enclosure only, follow these guidelines:
Position the enclosure in the rack so that you can easily view it and access it for
servicing. This action helps the rack to remain stable and provides a way for two
or more people to install and remove the enclosure.
If you are installing a control enclosure plus one or more expansion enclosures,
follow these guidelines:
If you have one or more expansion enclosures, position the control enclosure in the
middle of the expansion enclosures. Balance the expansion enclosures above and
below the control enclosure. Refer to Figure 10 on page 11.
For example, position the control enclosure in the middle of the enclosures for ease
of cabling.
v
You can have no more than five expansion enclosures attached to SAS port 1 of
the control enclosure.
v
You can have no more than four expansion enclosures attached to SAS port 2 of
the control enclosure.
v Position the enclosures together; avoid adding other equipment between
enclosures.
v
When you add the first expansion enclosure to a control enclosure, it is
preferable to add the enclosure directly below the control enclosure.
v
When you add a second expansion enclosure, it is preferable to add the
enclosure directly above the control enclosure. For each additional expansion
enclosure that you add, alternately add it below or above the control enclosure.
v
Position the enclosures in the rack so that you can easily view them and access
them for servicing. This action helps the rack to remain stable and provides a
way for two or more people to install and remove the enclosures.
If you are installing an expansion enclosure to an existing system, follow these
guidelines:
When you add the first expansion enclosure to a control enclosure, it is preferable
to add the enclosure directly below the control enclosure. When you add a second
expansion enclosure, it is preferable to add the enclosure directly above the control
enclosure. For each expansion enclosure that you add, alternately add it below or
above the control enclosure. Refer to Figure 10 on page 11.
If you are adding an expansion enclosure to an existing system, you do not need to
power off the system. You can add an expansion enclosure while the system is
operational.
10
Storwize V7000 Unified: Quick Installation Guide