3. Disconnect the cable guide clips from the 1U cable management tray.
4. Move the cables out of the way to provide access for servicing the shelf.
Third-party rack installation
Follow these best practice guidelines to ensure an orderly installation:
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Third-party racks might have PDUs which face into the rack. This can cause interference
between the shelf and/or rear CMAs. Carefully plan and route cables to minimize any
interference. It might be necessary to use a type of PDU that is mounted in the main rack area.
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The shelf rails have four adjustment ranges, 18-22", 22-26", 26-30", 30-34". The default
length (out of the shipping crate) is the 22-26" setting.
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After installation, check each rail to ensure that it is level and in the correct location before
installing the next rail.
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When securing rails to the NEMA channel, especially channels with square holes, install the
screws loosely to prevent cross threading, and tighten by hand. Do not over torque.
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Use black M5 screws, which align with both round and square channel holes, to secure all rails
and components in the customer racks. Discard all silver screws removed from the shipping
rack.
Modifying rail lengths
This procedure details how to extend or shorten the rail lengths to accommodate third-party
racks.
About this task
The rails have four adjustment ranges, 18-22", 22-26" (default), 26-30", 30-34". The length
adjustments provided in this procedure use the default length of 22-26" as a baseline.
The following links provide the steps for the various adjustment lengths:
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18-22" length procedure
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26-30" length procedure
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30-34" length procedure
Procedure
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To change the length of the rail to 18-22" (shortest setting) do the following:
Install the Disk Shelves in the Rack
50 Dell EMC PowerProtect DD9900 System Installation Guide
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