IBM 4957-J10, Manual

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12Gb/s SAS I/O Module LEDs
Table 5. SAS Activity LEDs
Condition
Activity LED (green) Fault LED (amber)
No Cable Present Off Off
Cable Present
All links up, no activity.
On Off
Cable Present All links up. Flash with aggregate port activity Off
Critical Fault
Any fault which causes operation
of the cable to cease or fail to
start, e.g. over current trip.
Off On
Non-Critical Fault
Any fault which does not cause
the connection to cease
operation, e.g. not all links
established over temperature.
Flash with aggregate port activity Flashing - 1s on 1s off
Table 6. Module Status LEDS
LED
State Description
Module Fault (amber) On A fault condition.
Off Module is operating normally.
Power (green) On Module powered.
Off No power.
ID (blue) On Controller being identified.
Figure 9. 12Gb/s SAS I/O Module Connectors and Indicators (viewed from rear of enclosure)
The I/O module has three mini-SAS-HD (SFF-8644) connector receptacles. By default each is configured
as a SAS-3 universal port.
Blank I/O modules
Blank I/O modules are provided and must be put in any vacant I/O module bay to make sure of airflow
and correct operation.
10 IBM Cloud Object Storage System: IBM Small J10 Disk Enclosure Manual