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Depends on several factors: Minimum / Maximum physical fan speed range Lower fan speed threshold settings Whether or not your mobo allows you to set fan speeds manually Presuming your board allows manual fan speed control, the gist of it is to first lower your Lower fan speed thresholds the...

Poking around a bit in the manual for that board... it looks like it could be limited to IPMI 1.5, though there might also be a BIOS level option to change that. If it doesn't support IPMI 2.0, that fact might correlate to those raw commands failing to work, but I don't know for sure if there is...

Right. That is normal. You need a start-up script, such as a systemd service daemon. Solution options depend on your operating system and technical prowess. Check your CPU temps while the fans are at that speed. If the CPU gets too hot, system will override your settings and push fans to max...

@ziggygt you could also try this X9 command variant I found to control fan zone: ipmitool raw 0x30 0x91 0x5A 0x03 "0x1{zone}" "0x{duty_hex}" where "zone" = 0 or 1 where "duty_hex" = 0x00 to 0xFF ( 0-100 converted to a scale of 0-FF or 0-255; i.e. 255 = 100% power) I can confirm that command...

One more related comment... most Supermicro boards do not support individual fan control, so I'm not certain those commands mentioned above will work. My suspicion is they probably work for one of the 4 possible BMCs on X9 boards, but I don't know which one(s) - if any. As I mentioned in my...

That IPMI command is for Supermicro X10/X11 boards, which is why it didn't work on your X9 board. Yes. You're right. Thanks for digging into that.... There is no decoder manual and unfortunately, as you've experienced it is a very confusing topic. Sometimes it's possible to find information...

Ah, gotcha. Thanks for explaining. :) Incidentally, here is a link to your mobo's manual. Supermicro tends to make these difficult to find: https://www.supermicro.com/manuals/motherboard/C606_602/MNL-1306.pdf Well, my understanding/experience is the exact %age of fan speed can vary depending...

@ziggygt you need to provide context. No one will be able to answer your questions without that. For example, what motherboard make and model are you inquiring about? And what is the "interesting paper" you're referring to?

I am curious... have you tried to control the 0x11 fan zone? Two possible outcomes seem likely: Nothing happens All fans A-H turn on (i.e. 0x12 and 0x13 zones combined) Would you mind trying this out sometime (or have you already)? Boards with > 2 fan zones are very rare (not including boards...

hwmon seems sketchy from my experience, especially with regards to fan control. I have never been able to get it to work reliably. Just saying, I believe you're not the only one who's been frustrated when it comes to writing data to it! LoL Supermicro seems to be really hit-or-miss with regards...

Not intending to sound critical here, but are you certain you've followed the typical Supermicro procedures, and the fans are not obeying? I'm asking b/c that board has the Nuvoton WPCM450 BMC chip. I know the Nuvoton WPCM450R does permit fan control via IPMI, but I am wondering if perhaps the...

Based on your shared experiences so far, I'm not sure if Optimal mode will actually work as intended with your current hardware. I agree that it ought to you if you adjust the BMC fan threshold settings. However, this also depends on whether the 25500 current fan speed reading you're getting is...

Ah... now, I see. You have several things going on here which complicate the situation quite a bit, and may make it virtually impossible to attain your goals without making some compromises of one sort or another. mix of fan brands and models in same fan zone 3-pin fans daisy-chained fans in...

@TexasDave I'm digging a little deeper this morning... I just realized I didn't know your model of mobo existed. I have a database containing most of Supermicro's server board models, with some basic information about them such as BMC chip model. Yours appears to be an Aspeed AST 2400. I should...

btw, ironically, I am sort of opposite of your situation... I lived in the UK quite a long time ago for a few years... now, I live in Texas!

Do you have different fans in each fan header? The same? Or some combination? The fan speeds in screen shot 2 don't look right. FAN1 and FAN3 in particular. The sensor readings are virtually impossible to be correct. What happens if you set optimal mode? sudo ipmitool 0x30 0x45 0x01 0x02

Adding a bit more context... on the X10 boards, the fans are grouped into "zones." You can only manipulate their fan speed manually by changing the speed of all the fans in the same group or zone at the same time. You cannot set each fan's speed individually. Now, there are some other important...

Great minds think alike when it comes to usernames! LoL :cool: :D The IPMI command you need is broken down like this (# = byte position) 1: 0x30 2: 0x70 3: 0x66 4: 0x01 5: zone id 6: duty_hex range 0-100 (same as human %age in hex, i.e. 0x00 to 0x64) These examples should work for you: Set...

he he... no.... I've been collecting this type of data on HDD and SDD reliability for awhile. On my personal 'to-do' list is to publish this information as some of it is very difficult to find, and frankly it's a huge pain for anyone to try and dig up this type of info at the moment it's...

WUH721816ALE6L4, yes: manu/gen capacity ARR model # of samples avg sample age (months) Western Digital Ultrastar DC HC550 (SE) 16 TB 0.23% WUH721816ALE6L4 1,767 5 DOR (Date of Release) 2019. specs...