Table 6 Non-operational disk drive status indications
DescriptionFaultOnlineActivity
Indicates no connection or the controllers are offline.
Recommended corrective actions:
1. Check power supplies for proper operation.
2. If defective, replace disk drive.
OnOnOn
Indicates disk drive error/not active. Recommended
corrective actions:
1. Verify FC loop continuity.
2. Replace disk drive.
FlashingOffOn
Disk drive blank
To maintain the proper enclosure air flow, a disk drive or a disk drive blank must be installed in
each drive bay. The disk drive blank maintains proper airflow within the disk enclosure.
Power supplies and blowers
This section describes the function and operation of the disk enclosure power supplies and blowers.
Figure 12 (page 31) illustrates the major power supply and cooling components.
Figure 12 Power supply and blower assembly components
1. Power supply
2. Status indicator
3. AC Input connector with bail
4. Module latch (red wine-colored)
5. Blower tabs (red wine-colored)
6. Blower
Power supplies
The two power supplies mount in the rear of the enclosure. See Figure 23 (page 56). The supplies
are autoranging and operate on a country-specific AC input voltage of 202 to 240 VAC ±10%,
50 to 60 Hz, ±5%, (188 to 264 VAC, 47 to 63 Hz).
The DC outputs of this power supply are:
• +5.1 VDC for the EMU, I/O module, backplane, and disk drives
• +12.1 VDC for the disk drives
• +12.5 VDC for the disk drives
Fibre Channel drive enclosures 31
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