existing storage subsystem or storage enclosure, position the DCS3700 support rails directly above it. If
the support rails will be installed below an existing storage subsystem or storage enclosure, allow 178
mm (7 in.) of vertical clearance for the DCS3700.
Notes:
1. For proper weight distribution, install the support rails as low in the rack cabinet as possible.
2. The rack cabinet must have a minimum depth of 100 cm (40 in.).
3. If you are using a non-IBM rack or cabinet, review the information in Appendix C, “Specifications for
non-IBM rack installation,” on page 147.
To install the left and right support rails in the rack cabinet, complete the following steps.
1. Make sure that the rack has already been installed.
2. Make sure that a stabilizer has been attached correctly to the bottom front of the rack to prevent the
rack from tipping forward while the storage enclosure is being installed.
Refer to the installation and service guide, or equivalent, for the rack as required.
3. Locate the two support rails, eight M5 screws, and eight washers that are supplied with the storage
enclosure.
Note: The screws and washers might already be attached to the support rails. If so, remove them
from the support rails.
4. Starting with the left support rail, loosen the two rail adjustment screws with a medium flat-blade
screwdriver. The adjustment screws are used to lock the support rails at a certain length.
Note: The support rails are not marked as left or right. However, each rail can be mounted correctly
on only one side of the rack cabinet. The rails should be mounted with the alignment pin at
the rear of the rack.
Front
Rear
Front rack
cabinet rail
Screws
Support
rail lip
Rail adjustment
screws
Rear rack
cabinet rail
Screws
5. Hold the front of the left support rail against the inside of the front rack cabinet support flange, and
extend the rear of the support rail until it makes contact with the rear rack cabinet support flange.
The alignment pins at the rear of the support rail slide into the mounting holes at the rear of the
rack cabinet. The wider end of the support rail must be positioned at the front of the rack cabinet.
6. From the front of the rack cabinet, with the support-rail flanges positioned inside the rack cabinet
support rail assemblies, insert two M5 screws with washers through the front of the cabinet and
screw them into the support rail front flange. Make sure that you use a washer when you install an
M5 screw through a square hole on a rack-mounting flange.
Attention: Make sure that the screws are tight enough to support the weight of the storage
enclosure, but do not completely tighten the screws yet.
Chapter 2. Installing the DCS3700 33
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