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fabianborg
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Micron MT36HTF1G72FZ-667C1D4 BMC firmware needed

I have a 64GB kit of Micron MT36HTF1G72FZ-667C1D4 RAM installed on Dell PowerEdge 1950 Gen II and I have an issue where the BMC is spinning the cooling fans at over 8k rpm for no reason as the chassis, cpus and ram are in fact cool.

user@server:~$ sudo ipmitool sensor | grep Temp
Temp             | na         |            | na    | na        | na        | na        | 85.000    | 90.000    | na
Temp             | na         |            | na    | na        | na        | na        | 85.000    | 90.000    | na
Temp             | na         |            | na    | na        | na        | na        | na        | na        | na
Temp             | na         |            | na    | na        | na        | na        | na        | na        | na
Ambient Temp     | 19.000     | degrees C  | ok    | na        | 3.000     | 8.000     | 42.000    | 47.000    | na
CPU Temp Interf  | na         | discrete   | na    | na        | na        | na        | na        | na        | na

user@server:~$ sudo ipmitool sensor | grep FAN
FAN MOD 1A RPM   | 9375.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 1B RPM   | 9225.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 1C RPM   | 6075.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 1D RPM   | 6150.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 2A RPM   | 9675.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 2B RPM   | 9900.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 2C RPM   | 5925.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 2D RPM   | 6225.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 3A RPM   | 10425.000  | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 3B RPM   | 9675.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 3C RPM   | 6450.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 3D RPM   | 6375.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 4A RPM   | 10050.000  | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 4B RPM   | 10800.000  | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 4C RPM   | 6525.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 4D RPM   | 6600.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na

user@server:~$ sudo sensors
coretemp-isa-0000
Adapter: ISA adapter
Core 0:       +35.0°C  (high = +86.0°C, crit = +100.0°C)
Core 1:       +31.0°C  (high = +86.0°C, crit = +100.0°C)
Core 2:       +31.0°C  (high = +86.0°C, crit = +100.0°C)
Core 3:       +30.0°C  (high = +86.0°C, crit = +100.0°C)

coretemp-isa-0001
Adapter: ISA adapter
Core 0:       +32.0°C  (high = +86.0°C, crit = +100.0°C)
Core 1:       +33.0°C  (high = +86.0°C, crit = +100.0°C)
Core 2:       +33.0°C  (high = +86.0°C, crit = +100.0°C)
Core 3:       +34.0°C  (high = +86.0°C, crit = +100.0°C)

i5k_amb-isa-0000
Adapter: ISA adapter
Ch. 0 DIMM 0:  +46.0°C  (low  = +105.0°C, high = +120.0°C)
Ch. 1 DIMM 0:  +44.0°C  (low  = +105.0°C, high = +120.0°C)
Ch. 2 DIMM 0:  +46.0°C  (low  = +105.0°C, high = +120.0°C)
Ch. 3 DIMM 0:  +45.0°C  (low  = +105.0°C, high = +120.0°C)

I have researched the issue and most likely the BMC is not reconginsing the brand of the ram and to prevent damage, it spins the much faster.

Is there specific firmware that I need to install. As far as the BMC firmware goes, its up-to-date.

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3 Replies
Moderator
Moderator

RE: Micron MT36HTF1G72FZ-667C1D4 BMC firmware needed

Hello

Is there specific firmware that I need to install. As far as the BMC firmware goes, its up-to-date.

The BMC adjusts minimum fan speeds based on the configuration. Unless the fan response was changed between BMC revisions changing the firmware on the BMC will not change the fan response.

I don't show that memory in our part database, so it could be either the amount of memory in the system or that the memory is unsupported. You can test by removing all but the minimum amount of memory required for POST. If the minimum fan speed reduces then it is being increased because of population. If it does not decrease then it is likely increasing the fan speed because the memory is unsupported.

Thanks

Daniel Mysinger
Dell EMC, Enterprise Engineer

Get support on Twitter @DellCaresPRO

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fabianborg
1 Nickel

RE: Micron MT36HTF1G72FZ-667C1D4 BMC firmware needed

Daniel thanks for the update, a friend lent me a different brand of ram and the fans went down to the speeds hereunder, so I image that the brand is not supported by the BMC.

user@server:~$ sudo ipmitool sensor | grep FAN
FAN MOD 1A RPM   | 5925.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 1B RPM   | 5925.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 1C RPM   | 3675.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 1D RPM   | 3675.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 2A RPM   | 6075.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 2B RPM   | 5925.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 2C RPM   | 3675.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 2D RPM   | 3600.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 3A RPM   | 6000.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 3B RPM   | 5700.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 3C RPM   | 3600.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 3D RPM   | 3600.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 4A RPM   | 5850.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 4B RPM   | 6000.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 4C RPM   | 3600.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na
FAN MOD 4D RPM   | 3750.000   | RPM        | ok    | na        | 1575.000  | na        | na        | na        | na

Notice that there is a stark difference in the RPMs.

Despite the fan speed, BIOS and OS recognise the RAM and works just fine.

Just to make sure of this, is there a way to get a list of BMC supported RAM by the 1950 Gen II and Gen III please.

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Moderator
Moderator

RE: Micron MT36HTF1G72FZ-667C1D4 BMC firmware needed

is there a way to get a list of BMC supported RAM by the 1950 Gen II and Gen III please.

No, we do not have a public part database. You can contact spare parts sales to see what we have available. Also, there is nothing proprietary about the memory in our servers. Many manufacturers have compatibility lists of their memory for our servers, but there is not a list that we maintain that is publicly available.

Thanks

Daniel Mysinger
Dell EMC, Enterprise Engineer

Get support on Twitter @DellCaresPRO

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