Lenovo D1212, Руководство по установке и обслуживанию оборудования

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Figure 15. Module Locations (2U24)
Enclosure Chassis
The chassis (Figure 16 “Enclosure Chassis (2U12) ” on page 14) consists of a sheet metal enclosure
assembly with an integrated midplane PCB and module runner system.
• The chassis has a 19 inch rack mounting that enables it to be installed on to standard 19 inch racks and
uses two EIA units of rack space (3.5 inch) for a 2U enclosure.
• The midplane PCB can have up to 24 drive connections (see “Enclosure Variants” on page 11 for details).
• There are up to 24 drive bays at the front of the enclosure, in horizontal or vertical orientation as defined
by the enclosure variant, see Figure 14 “Module Locations (2U12)” on page 12 and Figure 15 “Module
Locations (2U24)” on page 13. Each drive bay holds a plug-in drive carrier module that can hold these
drive types, dependent on the enclosure type:
– 2U12 enclosure: 12 Low Profile (1 inch high) 3.5 inch form factor drives, held horizontally.
– 2U24 enclosure: 24 Low Profile (5/8 inch high) 2.5 inch form factor drives, held vertically.
• At the rear, the chassis assembly can hold a maximum of two PCMs and two SBB ESMs.
Chapter 2
.
System Overview
13