AIC J2024-01, Руководство пользователя, Страница: 48 / 94

Chapter 3 Sub-System configuration Setup
J2024-01 User's Manual
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3.4.11 How to manually change PWM (fan speed) for all Cooling elements
The "RQST IDENT" for Cooling is defined in the bit7, byte1 and the
"REQUESTED SPEED CODE" is defined in the bit2 ~ 0, byte3 of the "Cooling
control element" in the SES specification. Set "RQST IDENT" bit to disable the
smart fan function, and then change PWM or fan speed for all Cooling
elements by setting the "REQUESTED SPEED CODE" bits. Clear "RQST IDENT"
bit to enable the smart fan function again. Please disable the smart fan
function before changing PWM or fan speed. Only Cooling element 0
supports this feature. We use the software package "sg3_utils" on Linux for
example, and have a SAS HBA and a cable to connect your host with the
expander.
(A) Show the device for AIC Expander Controller (canister)
$ sg_map -i
/dev/sg2 AIC 12G 2U24SAS3swap 0c01
(B)Set "RQST IDENT" of Cooling element 0 to disable the smart fan
function
$ sg_ses --descriptor=SystemCoolingElement01 --set=1:7:1 /dev/sg2
(C)Set "REQUESTED SPEED CODE" of Cooling element 0 to change PWM
or fan speed for all Cooling elements. Set "REQUESTED SPEED CODE"=7
(100% PWM) for example.
$ sg_ses --descriptor=SystemCoolingElement01 --set 3:2:3=7 /dev/sg2