Determining The Position Of The Shelves In The Rack - Quantum ATL StackLink Installation Instructions Manual

Chapter 2 Installing the Rack Mount Shelves

Determining the Position of the Shelves in the Rack

Determining the Position of the Shelves in the Rack
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Before starting to install the rack mount shelves:
1 Determine the proper position of the shelves in the rack (see
figure 14):
• Racks are measured in rack mount units. Each unit is called a
"U," and is equal to 1.75 inches (44.45 millimeters). When you
look at the rack rails, you will notice that the holes are divided
into groups of three, with each group separated by a slightly
smaller space. Each group of three equally spaced holes is one U
(see figure 14).
• An ATL M1500 library uses 4U of vertical space. The ATL M1500
rack mount shelves must be installed in a full U position (the
bottom of the rack mount shelf must be aligned with the bottom
of a U).
• An ATL M2500 library uses 13.5U of vertical space. The
ATL M2500 rack mount shelves can be installed in either a full U
or a half U position (the bottom of the rack mount shelf may be
aligned with either the bottom or the middle of a U).
2 Mark the desired shelf position on the rack rails.
ATL StackLink™ Installation Instructions
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