CRUs for IBM COS Medium / Large Disk Enclosure

A listing of Customer Replaceable Units for the Medium and Large Disk Enclosures.

Table 1. IBM COS Medium/Large Disk Enclosure product components for 4U 106-drive chassis
Item	Enclosure CRU and related component description	Access
1	Disk drive module: 3.5" DDIC (Disk in drive carrier)	Top
2	Chassis (sheet metal enclosure) with integrated PCBAs (included with chassis; not available separately)	Note 2
3	Power supply unit (PSU) module available as AC unit (chassis uses two PSUs of same model type)	Rear
4	Expansion module (IOM) for storage expansion Disk Enclosure Medium IOM and Disk Enclosure Large IOM are not interchangeable.	Rear
5	System fan module	Rear
6	Controller fan module	Top
7	HS Expander module (PCBA card)	Top
8	Rail kit (variable attachment options) Rack mount kit, shelf, long (1.2 m), HW Cable Management Arm (CMA) and brackets	Note 3
9	Cable kits [Cable package: standard HD mini-SAS (SFF-8644) to HD mini-SAS (SFF-8644)]	N/A
10	AC power cord compatible with AC PSU	N/a

1 - The Access column lists the enclosure panel from which the CRU is observed and accessed. It does not apply to other components.
2 - See Enclosure chassis for a description of the chassis CRU.
3 - See Rackmount rail kit and Routing cables using the CMA for descriptions of the rail kit and CMA.

Tip: Enclosure panel access diagrams for locating CRUs:

Front panel: see Figure 1 and Table 1.
Rear panel: see Table 1.
Top panel: see Figure 1, Figure 2, and Figure 3.

Tip: Enclosure dimetric pictorial views:

Projection from enclosure front panel: see Figure 1.
Projection from enclosure rear panel: see Figure 2.