Step 4. Reviewing Enclosure Location Guidelines - IBM Storwize V7000 Quick Installation Manual

Step 4. Reviewing enclosure location guidelines

Use these guidelines to create a plan that identifies an appropriate location in the rack for the enclosure
or enclosures that you are installing now or in the future. An enclosure requires two standard rack units
of space in a rack. See Figure 9 on page 10 for a sample template of two rack units. For example, position
the control enclosure in the middle of the rack beginning at rack numbers 18 and 19.
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.
Note: If you plan to add expansion enclosures in the future, review the guidelines for "If you are
installing an expansion enclosure only."
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 center of the rack.
Balance the expansion enclosures above and below the control enclosure.
For example, position the control enclosure in the middle of the rack 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 only, 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.
Chapter 1. Before you begin the installation
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