Going by the PDF here: http://www.staroceans.org/e-book/S2B%20IPMI%20Commands.pdf, which is for the SBR firmware found on the D51B-1u quanta Quantagrid 1u server, it seems you should be able to adust the fans using these commands:
61. Fan Command (1U) Type Command Format Description In Band ipmitool raw 0x30 0x39 0x01 0x10x0 0x3f Set BP fan 0 to 63 duties (=0x3fheximal; maximum duty is 63) ipmitool raw 0x30 0x39 0x01 0x10x1 0x3f Set BP fan 1 to 63 duties ipmitool raw 0x30 0x39 0x01 0x10x2 0x3f Set BP fan 2 to 63 duties ipmitool raw 0x30 0x39 0x01 0x10x3 0x3f Set BP fan 3 to 63 duties ipmitool raw 0x30 0x39 0x01 0x10x4 0x3f Set BP fan 4 to 63 duties ipmitool raw 0x30 0x39 0x01 0x10x5 0x3f Set BP fan 5 to 63 duties
Although this pdf says its for the D51B 1/2u chassis, when running these commands, you get the following error:
ipmitool raw 0x30 0x39 0x01 0x10x4 0x3f Given data "0x10x4" is invalid.
Is there a way to somehow get a list of the valid hex values for ipmitool raw to see if maybe it's as simple as changing 0x10x4 to something else?
I tried running the commands for the 2U from that doc, but doesn't seem to do anything.