2Chapter 2 System overview
2 System overview
The Quantum QXS storage series enclosures consist of a sheet metal chassis that contains an integrated
midplane and module runner system. You can mount the storage enclosure into a standard 19-inch rack
cabinet, occupying either two (2U) or five (5U) EIA rack space units. All plug-in modules are hot-swappable,
but you must adhere to all safety precautions and time limitations.
Type Typical set of plug-in modules Maximum expansions
2U12 storage enclosure 2U chassis and rackmount railkit Up to 9
12 3.5-inch large form factor (LFF) drive modules in carriers (DDICs)
Two controller modules (CMs)
Two power cooling modules (PCMs)
2U24 storage enclosure 2U chassis and rackmount railkit Up to 9
24 2.5-inch small form factor (SFF) DDICs
Two controller modules (CMs)
Two power cooling modules (PCMs)
5U84 storage enclosure 5U chassis and rackmount railkit:
Contains two drawers, each with 42 drive modules
Up to 3
84 3.5-inch or 2.5-inch drive modules with adapters in carriers
Two controller modules (CMs)
Five fan cooling modules (FCMs)
Two power supply units (PSUs)
Four sideplane printed circuit boards (PCBs), two per drawer
Authorized service personnel only
Table 1 Storage enclosure variations
You can use the 2U or 5U chassis as a controller storage enclosure when configured with controller modules,
or as an expansion enclosure when configured with input/output modules.
CAUTION Make sure you are not connected to power at any time during installation procedures.
CAUTION Only operate the storage enclosure in a dust-free environment to meet temperature control
and airflow requirements.
For optimum function, use the high availability (HA) model that requires dual paths for data and power to
increase fault tolerance and minimize single points of failure. This manual assumes HA model system
integration using a minimum of one fully populated storage enclosure.
Storage enclosure components
All Quantum QXS storage enclosures have 2 main access points:
1. Front panel area — Contains the operator's (ops) panel and access to drive modules in their carriers
(DDICs)
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