Dot Hill Systems AssuredSAN 4544, Setup Manual

Page: 18 / 100

18 Components
Controller enclosure — rear panel layout
The diagram and table below display and identify important component items that comprise the rear panel
layout of an AssuredSAN Ultra48 Series controller enclosure. The 4844 is shown as a representative
example of 2U48 controller enclosure models included in the product series.
Figure 5 Ultra48 Series high-capacity controller enclosure: rear panel
A controller enclosure accommodates two AC power supply FRUs within the two power supply slots (see
two instances of callout No.1 above). The controller enclosure accommodates two controller module FRUs
of the same type within the I/O module (IOM) slots (see callouts No.3 and No.4 above).
IMPORTANT: Ultra48 Series controller enclosures support dual-controller configuration only.
Single-controller support is provided only when a controller fails over to its partner controller. A controller
module must be installed in each IOM slot to ensure sufficient airflow through the enclosure during
operation.
The diagrams with tables that immediately follow provide descriptions for the controller modules and
power supply modules that can be installed into the rear panel of an Ultra48 Series controller enclosure.
Showing controller modules and power supply modules separately from the enclosure enables improved
clarity in identifying the component items called out in the diagrams and described in the tables.
Descriptions are also provided for optional drive enclosures supported by Ultra48 Series controller
enclosures for expanding storage capacity.
NOTE: Ultra48 Series enclosures support hot-plug replacement of redundant controller modules, fans,
power supplies, and expansion modules. Hot-add replacement of drive enclosures is also supported.
1 AC power supply
2 AC power switch
3 Controller module A (see face plate detail figures)
4 Controller module B (see face plate detail figures)
CACHE
LINK ACT
6Gb/s
CACHE
LINK ACT
6Gb/s
CLI
CLI
PORT 2 PORT 3
SERVICE−1 SERVICE−2
PORT 0 PORT 1
CLI
CLI
PORT 2 PORT 3
SERVICE−1 SERVICE−2
PORT 0 PORT 1
1 1
4
2 2
3