RAID monitoring

[Jim Nelson]

Matthew Geier wrote:
> John Heim wrote:
>> PS: The server came with a cable, about 3 feet long. One end plugs 
>> into the back of the server. The other end has a knob or button on the 
>> end. Can anybody tell me what that is? An external temp probe maybe?
>>   
> 
> No, would you believe it's just a blue LED on the end ?
> 
> The servers have an 'ID' LED on the front and back. It can be activated 
> by pressing the ID button or remotely using IMPI (?).
> 
> I assume the LED on the cable is for when you use the cable arms, as 
> when they are folded up, they block the view of the back of the server 
> and you wouldn't see the blinking blue light.
> 
> I also assume the blinken blue LEDs are for Data centres, were on site 
> 'grunt' is told, 'Install new HD in Rack 3, the server with the blinking 
> blue light'.
> 

Yes on all 3 counts - You can use either the command-line tool or the web 
console to make the light blink.  You can do the same thing with the hot-swap 
drives - at least on the newer servers.

The LED clips onto the back end of the cable tray, although some 1U models don't 
have the socket on the motherboard that the cable plugs into.

I haven't tried it through IPMI, but the OMSA cli works with the following command:

# omconfig chassis leds led=identify flash=on timeout=30

That'll make the identify light blink for 30 seconds.  Useful for hardware work 
- or trying to find where node #16 out of 50 is...