After pressing the release latch on the information panel, you can slide the light
path diagnostics panel out to view the lit LEDs. The LEDs indicate the type of
error that has occurred. See “MAP 5800: Light path” in the IBM System Storage
SAN Volume Controller: Service Guide for more detail.
To retract the panel, push it back into the node and snap it into place.
System-error LED
When it is lit, the system-error LED indicates that a system-board error has
occurred.
This amber LED lights up if the SAN Volume Controller hardware detects a fatal
error that requires a new field replaceable unit (FRU).
Note: See “MAP 5800: Light path” in the IBM System Storage SAN Volume
Controller: Service Guide to help you to isolate the faulty FRU.
A system-led error LED is also on the rear of the SAN Volume Controller.
Information-Error LED
When the information-error LED is lit, a non-critical event has occurred.
Check the light path diagnostics panel and the error log. Light path diagnostics are
described in more detail in the light path maintenance analysis procedure (MAP).
Location LED
The SAN Volume Controller does not use the location LED.
Hard disk drive activity LED
When it is lit, the green hard disk drive activity LED indicates that the hard disk
drive is in use.
Hard disk drive activity is shown on the hard disk drive activity LED. For the
SAN Volume Controller 2145-8F2, hard disk drive activity is also shown on the
hard disk drive itself.
Power control button
The power control button switches on or switches off the main power to the SAN
Volume Controller.
To turn on the power, press and release the power control button.
To turn off the power, press and release the power control button. For more
information about how to power off the SAN Volume Controller node, see “MAP
5350: Powering off a SAN Volume Controller node” in the IBM System Storage SAN
Volume Controller: Service Guide.
Note: When the node is operational and the power control button is pressed, the
SAN Volume Controller indicates on its front panel that it is powering off
and writes its control data to its internal disk. This can take up to five
minutes. If the power control button is pressed and not released, an
immediate power off is performed without writing the SAN Volume
Controller control data to disk. Service actions are then required to make the
SAN Volume Controller operational again. Therefore, when powering off,
you should not press and hold the power control button for more than two
seconds.
70 IBM System Storage SAN Volume Controller: Hardware Installation Guide
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