Dell PowerVault ML6000 - Manual (Page 317)

Chapter 12 Installing, Removing, and Replacing
Replacing a 9U Library Expansion Module
Dell PowerVault ML6000 User’s Guide 317
a From the front of the library, open the I/E station and access
doors of the 9U Library Expansion Module. Squeeze the handle
of the Y-rail release mechanism, lift it out of its locked position,
and slide it downward as far as it will go.
b From the back of the library, find the rear Y-rail release
mechanism, which is located in the interior of the right side of the
module. Squeeze the handle of the Y-rail release mechanism, lift
it out of its locked position, and slide it downward as far as it will
go.
Doing this aligns the Y-rails with the Y-rails of the module
beneath it.
1 Y-rail in unlocked, functional position