System Overview; Expansion Enclosure Components; Table 1 Expansion Enclosure Variations - Seagate Exos E 2U12 Series Hardware Installation And Maintenance Manual

2 System overview

The Seagate Exos E expansion series enclosures consist of a sheet metal chassis that contains an integrated midplane and
module runner system. You can mount the expansion 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.

Table 1 Expansion enclosure variations

Type
2U12 expansion enclosure 2U chassis and rackmount railkit
2U24 expansion enclosure 2U chassis and rackmount railkit
5U84 expansion enclosure 5U chassis and rackmount railkit:
Expansion enclosures can be configured as either an EBOD or a JBOD. An EBOD is an expansion enclosure attached to a
controller enclosure (RBOD). A JBOD is an expansion enclosure attached directly to a server that is equipped with a SAS HBA
or SAS RAID adapter.
CAUTION Make sure you are not connected to power at any time during installation procedures.
CAUTION Only operate the expansion enclosure in a dust-free environment to meet temperature control and airflow
requirements.

Expansion enclosure components

All Seagate Exos E expansion 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)
a. 2U enclosures — Direct access to DDICs
b. 5U enclosures — Access to DDICs by opening the related drawer
2. Rear panel area — Contains input/output modules and methods for cooling and powering the expansion enclosure
10 Chapter 2 System overview
Typical set of plug-in modules
12 3.5-inch large form factor (LFF) drive modules in carriers (DDICs)
Two input/output modules (IOMs)
Two power cooling modules (PCMs)
24 2.5-inch small form factor (SFF) DDICs
Two input/output modules (IOMs)
Two power cooling modules (PCMs)
Contains two drawers, each with 42 drive modules
84 3.5-inch or 2.5-inch drive modules with adapters in carriers
Two input/output modules (IOMs)
Five fan cooling modules (FCMs)
Two power supply units (PSUs)
Four sideplane printed circuit boards (PCBs), two per drawer
Authorized service personnel only
Maximum expansions
Up to 12
Up to 6
Up to 4