Quieting a Super Micro SC847 chassis

[philhu]

The unit comes with 7 honking screeching fans. All fans are connected by default, to cpufan1 port. Even with the screechers, and 22 disks, the inside case temp was getting to 47c, a bit warm

The schreechers were 6700 rpm, 84 cfm

So I removed again and replaced them with 5 different fans, so 2 fully pulled. Still loud, no temp change

I tried removing the 7 screechers, and replace with 4 0044l4 fans, but inside temp got to 56c, way too high, although system still marked that 'low'

So, next was those 3 0044L4 3600 rpm, 47cfm and 3 0104L4 2800 rpm,33cfm, not the 104l4 are in a green case, which will not fit in the sc847, I needed to put them in the screecher cases to fit. Pretty easy to do...

With this, the fans start at 2400 rpm, temp at 34c and slowly rises to 3600 rpm, case temp is 40c, and sound is down about half. The disks are at 42c. This is where it stays for days. I've enclosed my stats from IPMI monitoring. Got the disk temps from shell smartctl pgm

I think the 22 7200 rpm 4/6 tb drives is requiring the speed for temp reduction

Any ideas how to do betteron the sound?

 

[CookiesLikeWhoa]

If you don't mind me asking, what is your ambient temperature?

 

[philhu]

Right now, it is 28c. The system will be move in the basement. Temp there is usually steady at about 23c

 

[depasseg]

Something is wrong with your setup. Here are my results. I have drives in all the front bays and a handful in the rear. I'm using @Bidule0hm's awesome temps script. I don't have a temp sensor inside the JBOD that I can read, but the drives in the rear are usually a good indicator.

Ambient temp is 23C.

Temps at idle in my JBOD 847:

Code:

da12 WD-: 31 C
da13 WD-: 30 C
da14 WD-: 30 C
da15 WD-: 30 C
da16 WD-: 25 C
da17 WD-: 24 C
da18 WD-: 33 C
da19 WD-: 33 C
da20 WD-: 32 C
da21 WD-: 31 C
da22 WD-: 25 C
da23 WD-: 24 C
da24 WD-: 32 C
da25 WD-: 33 C
da26 WD-: 33 C
da27 WD-: 33 C
da28 WD-: 30 C
da29 WD-: 24 C
da30 WD-: 32 C
da31 WD-: 31 C
da32 WD-: 31 C
da33 WD-: 30 C
da34 WD-: 25 C
da35 WD-: 31 C
da36 WD-: 28 C
da37 WD-: 27 C

Temps after doing a scrub for 10 minutes:

Code:

da12 WD-: 31 C
da13 WD-: 30 C
da14 WD-: 29 C
da15 WD-: 29 C
da16 WD-: 25 C
da17 WD-: 24 C
da18 WD-: 33 C
da19 WD-: 33 C
da20 WD-: 32 C
da21 WD-: 30 C
da22 WD-: 25 C
da23 WD-: 24 C
da24 WD-: 32 C
da25 WD-: 33 C
da26 WD-: 33 C
da27 WD-: 32 C
da28 WD-: 30 C
da29 WD-: 24 C
da30 WD-: 32 C
da31 WD-: 31 C
da32 WD-: 31 C
da33 WD-: 30 C
da34 WD-: 24 C
da35 WD-: 31 C
da36 WD-: 27 C
da37 WD-: 27 C

 

[philhu]

Yes. But are u using the screech fans? Are your disks 5400 or 7200 rpm. That makes a huge difference

What is your ststem temp?

 

[depasseg]

Screech fans? I'm using stock.
The JBOD has a small controller in it (sorta like a MB) which originally had all the fans connected to (and for some reason were full throttle all the time). I moved all the fan connections to the backplane instead which allowed for variable speed fans and a much quieter noise level

7200rpm.

There is no "system". It's a JBOD enclosure. But the drives in the rear get hit with the exhaust air from the drives in the front, and none of the drive temps are out of the ordinary.

What are your drive temps?

 

[philhu]

Screech fans are the stock fans. Very loud. Mine has a x8dtn+ mb in it, could explain higher temps

Are your disks 5400 or 7200 rpm?

My disk temps are about 35-38 using 7200 rpm drives

 

[depasseg]

7200rpm.

 

[philhu]

Well. My goal is way lower sound than stock fans. I took out 2 and replaced with other sm fans and sound is half as loud

 

[CookiesLikeWhoa]

One of the things working against you use the high ambient temperature. But it just sounds like you are not getting proper exhaust ventilation.

The other thing could be the processors. If they are anything like their consumer brethren, I can imagine they are quite toasty especially to have two of them. If you're not getting proper exhaust ventilation I could imagine that heat from those processors might be getting stuck in there.

 

[philhu]

The x8dtn+ is a commercial sm board. Uses 2 quad xeon processors. Not user chips

 

[CookiesLikeWhoa]

I'm aware.

I don't know how hot a pair of L-5660 xeon's get, but I've had experience with a consumer chip (i7-950) and an X5660 from that same generation and they always ran pretty warm.. Especially when you compare that to anything post Sandy Bridge era.

 

[philhu]

Well the mb has the 2 xeon lined up a bit wierd. Ipmi says temp on one is low and the other at end of board is medium