IBM Storwize V7000 Unified Quick Installation Manual page 30

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 11 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
v You can have no more than four expansion enclosures attached to SAS port 2 of
v Position the enclosures together; avoid adding other equipment between
v When you add the first expansion enclosure to a control enclosure, it is
v When you add a second expansion enclosure, it is preferable to add the
v Position the enclosures in the rack so that you can easily view them and access
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 11 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.
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IBM Storwize V7000 Unified: Model 2073-720 Quick Installation Guide
the control enclosure.
the control enclosure.
enclosures.
preferable to add the enclosure directly below the control enclosure.
enclosure directly above the control enclosure. For each additional expansion
enclosure that you add, alternately add it below or above the control enclosure.
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.