Dell PowerVault ML6010 Troubleshooting Manual page 172

Installing, Removing, and Replacing
location of the 9U Library Expansion Module's rack ears, and prepare to install the nut clip (or cage nut) to that
location on the rack.
For example, if the 9U Library Expansion Module's rack ears are located at 1U and 2U, then the nut clips (or cage
nuts) should be installed at 10U and 11U.
Next, determine which holes you must use within the 10U and 11U markers. Notice that each rack unit (U), as
delineated by the alignment markers in the rack, contains three mounting holes. If you are adding a module
anywhere above the 5U Library Control Module, position the nut clip (or cage nut) at the middle hole in that unit.
If you are adding a module anywhere below the 5U Library Control Module, position the nut clip (or cage nut) at
the upper hole in that unit.
b
If you are adding a module directly above a previously racked 5U Library Control Module, count five full units from
the location of the 5U Library Control Module's rack ears, and prepare to install the nut clip (or cage nut) to that
location on the rack.
For example, if the 5U Library Control Module's rack ears are located at 1U and 2U, then the nut clips (or cage
nuts) should be installed at 6U and 7U.
Next, determine which holes you must use within the 6U and 7U markers. Notice that each rack unit, as delineated
by the alignment markers in the rack, contains three mounting holes. If you are adding a module anywhere above
the 5U Library Control Module, position the nut clip (or cage nut) at the middle hole in that unit. If you are adding
a module anywhere below the 5U Library Control Module, position the nut clip (or cage nut) at the upper hole in
that unit.
3
Install the nut clips (or cage nuts) to the desired location in the rack.
Installing nut clips:
a
Hold the nut clip so that its semi-circle design faces outside the rack.
b
Push the nut clip onto the rack's mounting holes so that the nut is behind the rack's holes. (After the nut clip is
installed, you can slide it up and down the mounting holes, if necessary.)
Installing cage nuts:
a
Hold the cage nut so that its hinges face outside the rack, and so that its hinges clasp the upper and lower
portions of the square hole.
b
Place the cage nut in the desired hole. Insert one hinge in the hole first, then pinch the cage nut and push it into
the hole until it snaps into place. (You may want to use a screwdriver to help push the hinge into the hole.)
4
Prepare the module to be stacked in the rack.
a
Power off the module and disconnect all power cords, network data cables, and module-to-module cables.
b
Consider removing all tape drives from the module. Modules are much easier to lift into the rack without the
additional weight of the tape drives.
c
Open the module's access door and raise the guide pin by pulling it up and turning it slightly as if it were a screw.
Otherwise, the guide pin may scratch the front doors of the module on which you are stacking it.
1 Guide pin
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