IBM J15, Manual

Page: 73 / 142

Procedure
1. Stop all I/O to the system from hosts that access the disk enclosure.
2. Wait 5 minutes for all write data to be flushed to the drives.
3. Unplug both of the power cords from the rear of the disk enclosure to remove all power from the
enclosure.
5U92 disk enclosure LEDs and indicators
The 5U92 disk enclosure has several sets of LEDs that provide information about the overall status of the
enclosure, power, drives, fans, canisters, and SAS connections.
A 5U92 disk enclosure has sets of LEDs on the front and rear of the enclosure. Inside of the disk
enclosure, LEDs also indicate the status of the drives and each secondary expander module.
LEDs on the front of the disk enclosure
As Figure 45 on page 45 shows, the front of the 5U92 expansion enclosure contains LEDs for the display
panel ( 1 ) and for each of the power supply units ( 3 ).
Figure 45. LEDs on the front of the disk enclosure
1 Display panel LEDs
2 Rack retention thumb screws
3 Power supply unit LEDs
4 Power supply units (PSUs)
5 PSU fascia (1U)
6 Front fascia (4U)
The display panel ( 1 ) contains three LEDs that describe the operational status of the disk enclosure.
Table 6 on page 45 describes the function and meaning of the LEDs on the front display panel.
Table 6. Display panel LEDs
Function
Color Status Description
Power Green On The disk enclosure power is on; this LED is controlled
by the disk enclosure.
Off The disk enclosure power is off.
Identify Blue On Identifies the disk enclosure; this LED is controlled by
the system. Use the management GUI or service
interface to identify an enclosure.
Off The disk enclosure is operating normally.
Enclosure fault Amber On The disk enclosure is coming up or a fault is detected
against a component within the enclosure.
Off No faults are detected.
Chapter 2. Installing the system hardware 45