Esm Leds; Sas Host Port Adapter Leds - IBM DCS3860 Installation, User's, And Maintenance Manual

Cache active LED (green)
When this LED is lit, it indicates that battery backup has been enabled and
data is in the memory cache. When this LED is flashing, cache offload is in
process. When this LED is off, caching is turned off and no data is in the
memory cache.
Fault LED (amber)
When this LED is lit, it indicates that a fault has occurred in the controller
and the controller must be replaced. The normal condition of this LED is
off.
Service Action Allowed LED (blue)
When this LED is lit, it indicates that it is safe to remove the controller
from the DCS3860; no activity is taking place, and no data remains in the
memory cache. The normal condition of this LED is off.
Battery charging LED (green)
When this LED is lit, the battery is fully charged. When this LED is
flashing, the battery is charging. When this LED is off, the battery either
failed or has been removed from the controller.
Battery fault LED (amber)
When this LED is lit, it indicates that the battery fails to hold a charge and
should be replaced. The normal condition of this LED is off.
Figure 29. SAS host port adapter LEDs
SAS link service action LED (amber)
When this LED is lit, it indicates a problem with the SAS link that requires
service action. The normal condition of this LED is off.
SAS link up LED (green)
When this LED is lit, it indicates that the link is established between the
controller and a host. When this LED is flashing, it indicates activity on the
link. When this LED is off, no link is established.

ESM LEDs

This section describes the ESM LEDS. Figure 30 on page 64 shows the LEDs on the
ESM.
Chapter 4. Operating the DCS3860 storage system and EXP3800 expansion enclosure
SAS link service
action LED (amber)
SAS link up LED
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