Compaq 230050-001 - StorageWorks NAS B3000 Model N900 Server Rack Installation Instructions page 4

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When installing in a square-hole rack, position the left rack-
mounting bracket 1 just behind the front vertical rail, aligning the
middle two rack-mounting bracket holes with the rail holes that
were pencil-marked in step 2.
IMPORTANT When the rack-mounting bracket is properly positioned, the two flanges
on each alignment clamp are inserted completely into the square hole of the vertical
rail. When the mounting bracket is parallel from front to rear as in step 5, the rear
side flange bracket occupies the lower U-space.
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IMPORTANT When the rack-mounting bracket 1 is parallel from front to rear, the
U-nut is installed in the center hole.
For round-hole rail racks only, follow step 6 to install a U-nut, and
then position the mounting bracket.
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For square-hole racks, extend the side mounting bracket through
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the rear vertical rail holes, and then secure the bracket to the rear
vertical rail using two washers and two Kep nuts.
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a. For round-hole racks, secure the rack-mounting bracket to
the front vertical rail using two pan-head SEMS screws (10-
32 X 5/8 in).
b. Secure the rack-mounting bracket to the rear of the inner
vertical rail or side flange bracket using a pan-head SEMS
screw (10-32 X 5/8).
c. Install the rear stop bracket and screw 3 that came with the
controller enclosure.
d. Fully tighten the rack-mounting bracket screws.
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Repeat the above procedure for the opposite side.
Label and remove all hard drives.
IMPORTANT Compaq recommends that you label each drive to indicate its original
slot. Doing this enables you to replace the drives into their original slots after
installing the storage enclosure into the rack. Replacing drives into their original
slots preserves physical organization of the disks as a contiguous set. However, the
performance and reliability of the storage enclosure are not affected by physically
rearranging the drive order.
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