Rack Guide; M-Series Disk Array Size; Mount In A Rack; Improper Mount - NEC M310 Configuration Manual

3. Rack Guide

When mounting M-Series Disk Array in a rack, the following guidelines must be considered.

M-Series Disk Array Size

The height of storage units is standardized as "U"(1U=44.45mm/1.75inches) by EIA. Rack-mounting
described below is based on the U number.
M110/310 Disk Array : Height and Depth
M-Series
Disk Array
Height
Depth

Mount in a Rack

(1) Disk Array Units do not exceed the maximum loading weight of the rack. The heavier unit is
mounted in the bottom of the rack.
(2) Each unit is mounted from the bottom with no space between. The monitor/keyboard can be
positioned in the convenient level.
Caution: When mounting the units deeper than DAC or DE in M-Series Disk Array, one above the
other, allow 1U space over or below.

Improper Mount

Front
Unit deeper than M-Series Disk Array
M-Series Disk Array (DAC/DE)
Unit deeper than M-Series Disk Array
Side view
Proper Mount (Example 1)
Unit deeper than M-Series Disk Array
Front
1U space
M-Series Disk Array (DAC/DE)
Unit deeper than M-Series Disk Array
Side view
Proper Mount (Example 2)
Unit deeper than M-Series Disk Array
Front
M-Series Disk Array (DAC/DE)
1U space
Unit deeper than M-Series Disk Array
Side view
Disk Array Controller (DAC)
M110/M310
2U
556.0mm/21.89inches
NEC Confidential
Disk Enclosure (DE)
548.5mm/21.59inches
Rear
Rear
Rear
2U
Not enough
Space in between!
Enough space in
between!
Enough space in
between!
51