How to change FAN Speed on SKY-8200

Purpose: 

There are 3 FAN modules in SKY-8200, a module contains 2 FAN units (6 units in total). User is able to control FAN speed by sending IPMI command to BMC.   

Target Audience:

Everyone who uses this server with BMC accessible (e.g. through KCS , NC-SI..etc) conditions

Minimum requirement:

1. SKY-8200 
2. IPMItool running in local OS or remote clients

FAN Level Reference Table :

The controllable FAN level is from 1 to 4 as following table

FAN level	Speed on FAN units
Level 1 (55%) (Room temp:27 deg, FAN noise is under than 78 db )	Module FAN1/3/5 : 7500 rpm Module FAN2/4/6 : 6500 rpm
Level 2 (70%)	Module FAN1/3/5 : 8300 rpm Module FAN2/4/6 : 7500 rpm
Level 3 (85%)	Module FAN1/3/5: 9000 rpm Module FAN2/4/6: 8000 rpm
Level 4 (100%) (Full Speed)	Module FAN1/3/5 : 9500 rpm Module FAN2/4/6: 8500 rpm

Commands & Steps:

Read FAN Level :  ipmitool raw 0x2e 0x95 0x39 0x28 0x00 0x00

Response : 39 28 00 <smart fan status> <Level>

By read FAN level command, the 4^th byte of response means smart FAN status. 

01 = smart FAN was Enabled  ;  00 = smart FAN was Disabled 

The controllable FAN level is from 1 to 4 as following table 

Set FAN Speed: ipmitool raw 0x2e 0x95 0x39 0x28 0x00 0x02 <Level>

BMC will temporary disable smart FAN function when FAN speed was manually set. Smart FAN control will be recovered after system AC power cycle or by sending IPMI command (see below)

Enable Smart FAN: ipmitool raw 0x2e 0x95 0x39 0x28 0x00 0x01