Using sg_ses to change cooling element rpm speed

[Jeff Johnson <jeff.johnson@aeoncomputing.com>]

Greetings,

I'm beating my head against the desk trying to use sg_ses to change the 
cooling control element requested speed code for a fan connected to an 
LSI SAS2X36 SAS expander.

I have tried the raw->edit<-raw method and tried the 
--data/--index/--control method and neither seems to work.

Polling status for the cooling element (--index=26) gets me:

Element 26 descriptor:
         Predicted failure=0, Disabled=0, Swap=0, status: OK
         Ident=0, Hot swap=0, Fail=0, Requested on=1, Off=0
         Actual speed=4920 rpm, Fan at lowest speed

Issuing the following command doesn't change the rpm speed:
'sg_ses --page=0x2 /dev/sg1 --index=26 --control --data=70,00,00,27'

Per the SES spec that string should select "Fan at highest speed".

I have also tried taking the raw output, editing the bytes for the 
element and sending it back and it also does nothing. The sg_ses command 
succeeds but there are no intended results.

Am I using the command syntax correctly? I want to be sure before I go 
after the vendor for improper support of the SES specification.


Thanks!

--Jeff

-- 
------------------------------
Jeff Johnson
Co-Founder

Aeon Computing, Inc
High-performance computing / Lustre filesystems

jeff.johnson@aeoncomputing.com
www.aeoncomputing.com
t: 858-412-3810 x101   f: 858-412-3845

4170 Morena Boulevard, Suite D - San Diego, CA 92117