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5.3.3 Drive Carrier Module and Status Indicator
The Drive Carrier Module comprises a hard disk mounted in a carrier (Figure 5–6). Each drive bay can
house a single Low Profile 1.0 inch high, 3.5 inch form factor disk drive in its carrier.
The handle provides the following functions:
• Camming of carrier into and out of drive bays.
• Positive 'spring loading' of the drive/baseplane connector.
• The handle assembly also incorporates a Drive Status LED (Figure 5–6).
Note The enclosure system design allows for drive bays to be left empty without the need for fitting dummy
drive carriers.
5.3.4 DEM Card
The drive enclosure contains eight (8) top-loadable DEMs. The DEMs (Figure 5–7) provide the SAS
connectivity between the I/O module and the HDDs located within the enclosure.
I/O Module
Fault
Amber OFF
ON
•No Faults present
I/O Fault
•Off
I/O Module
Identity
Blue ON
OFF
•Receiving SES
Command
Not receiving SES
Command
•Off
Table 5–2 I/O Module LEDs
Figure 5–6 Drive Carrier Module: Closed and Opened
LED