Chapter 2 System overview 3
a. 2U enclosures — Direct access to DDICs
b. 5U enclosures — Access to DDICs by opening the related drawer
2. Rear panel area — Contains controller modules and methods for cooling and powering the storage
enclosure
Storage enclosure chassis
Chassis sheet metal is bonded and riveted together and free from non-conductive coatings. Each chassis is
designed specifically for mounting in a rack cabinet.
2U enclosure components
The front panel area hosts an operator's panel and the drive modules.
l
2U12— Contains 3.5-inch large form factor (LFF) drives installed in keyed carriers, inserted into horizontal
slots, and logically numbered in rows from 0 to 11 from left to right, from top to bottom
l
2U24— Contains 2.5-inch small form factor (SFF) drives installed in keyed carriers, inserted into vertical
slots, and logically numbered from 0 to 23 from left to right
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