Sun Microsystems Fire X4540, Administration Manual

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Chapter 4 Disk Administration and Management 29
Disk Drive Status and LEDs
Each hard disk drive has a sensor that is used to communicate the state for the
slot.The hard disk drives use IPMI (Intelligent Platform Management Interface)
sensors to convey a slot state see
TABLE 4-1
:
Inside the Sun Fire X4500 server chassis there are three LEDs for each of the 48 hard
disk drives: one for the Activity LED (green), one for the Fault (amber) LED and the
third for the "OK to remove" (blue) LED.
The individual LED locator can be used to control both the fault and removal LEDs
through an IPMI OEM command. The service processor handles all aspects of the
fault and removes LEDs automatically based on events in the disk drive sensors see
TABLE 4-2
.
TABLE 4-1
Disk Drive Status Sensors
State Event Description
0 Device Not Present The drive bay is empty.
1 Device Installed The drive is detected. Used by remote management
applications.
2 Ready for Device Removal A drive is unmounted and ready to be physically
removed. Controls the OK to Remove LED.
3 Device Faulted Causes the service processor to illuminate the individual
disk drive fault LED.
TABLE 4-2
Disk Drive LED Indicators
LED Event Description
Green Disk drive activity Controlled by hardware. Does not require SP interaction.
Amber Hard disk drive failure Controlled by the SP over the SP-12C bus. Relies on the
operating system driver to set appropriately.
Blue Hard disk drive ready for
removal Controlled by the SP over the SP-12C bus. The operating
system determines that the drive has been halted and is
ready to be removed.