BUILD Supermicro 825TQ Noise

[jgreco]

Oh this sux lol. I remember researching between the two but i forgot why i went with HGST drives.So for a vdev its a good idea to keep the same size and brand etc.I can prolly look into getting wd reds for another vdev instead of mixing and matching on the same vdev

No, there's no reason that keeping the same brand for a vdev is a good idea. Homogeneous vdevs are more prone to failure, actually. The people who claim otherwise are usually those who are "used" to getting homogeneous arrays, but there are times these begin falling apart rapidly.

It's a good idea to match performance characteristics if you can.

 

[anodos]

Positioning of the fans having a significant impact is merely a sign that there isn't a sufficient pressure differential. It's a sign of "stupid" (for FreeNAS-style-purposes) design.

Assuming my recollection of that catastro-fsck is accurate, this really comes down to an issue of making it once again think it's an SC826. You go and block all the top row airflow. You make sure that there's a tray blank in any empty trays, and ideally I think what you probably want is to occupy all four middle row drive bays and the two center bays in the bottom.

Any thoughts on how to restrict airflow through the right couple of bays on the upper row of the chassis? They're a little more annoying since they are populated with power buttons and a serial port / USB. Worst case scenario, I could just cram some cardboard in there. :D I will try obstructing it once I some free time to monkey with things and report back.

 

[jgreco]

Any thoughts on how to restrict airflow through the right couple of bays on the upper row of the chassis? They're a little more annoying since they are populated with power buttons and a serial port / USB. Worst case scenario, I could just cram some cardboard in there. :D I will try obstructing it once I some free time to monkey with things and report back.

Follow the advice of the Tappet Brothers.

Black tape for the win. Just get a good quality electrical tape and affix it to the front panel. Easily trimmed to fit around any inconvenient buttons. Also if there are any too-bright LED's, fix that too

 

[Ericloewe]

Follow the advice of the Tappet Brothers.

Black tape for the win. Just get a good quality electrical tape and affix it to the front panel. Easily trimmed to fit around any inconvenient buttons. Also if there are any too-bright LED's, fix that too :)

There's nothing duct tape won't fix. You just need the right kind of duct tape. :D

 

[anodos]

There's nothing duct tape won't fix. You just need the right kind of duct tape. :D

 

[jgreco]

Duct tape is ugly in this application. A good quality electrical tape is sufficient; it's an air intake and so there is no great stress on the adhesive. The black tape will also more closely match the server chassis paint, while simultaneously not sticking so aggressively that it takes the paint off if ever you need to remove it.

Five points will be deducted from @Ericloewe for suggesting a poorer fix.

 

[Ericloewe]

A good quality electrical tape is sufficient; it's an air intake and so there is no great stress on the adhesive. The black tape will also more closely match the server chassis paint, while simultaneously not sticking so aggressively that it takes the paint off if ever you need to remove it.

That's exactly what I meant, though the good electrical tape tends to be more adhesive than most packaging tapes.

I consider "Duct Tape" to be equivalent to "Adhesive Tape", since nobody actually calls it that. Electrical tape is just duct tape that is rated for electrical insulation.

My comment was meant to illustrate that there's a type of tape for every situation in life: https://en.wikipedia.org/wiki/List_of_adhesive_tapes

As is typical of Wikipedia, I learned way more than I needed to know about certain types of tape (and more than I wanted to know about some other subjects...).

 

[jgreco]

Naw, duct tape is definitely the stuff the Mythbusters use for their crazy duct tape experiments, it's a multimaterial tape that integrates a cloth-like layer with some form of plastic and then a pressure-activated adhesive. It is a very different thing from packing tape or electrical tape.

 

[anodos]

Naw, duct tape is definitely the stuff the Mythbusters use for their crazy duct tape experiments, it's a multimaterial tape that integrates a cloth-like layer with some form of plastic and then a pressure-activated adhesive. It is a very different thing from packing tape or electrical tape.

Out of sheer contrariness (and not being able to find my black electrical tape), I decided to use blue 3m painter's tape to test blocking the top row and reducing fan speed. For testing purposes, it is probably better than both electrical tape and duct tape (easier removal with less residue) :p

 

[anodos]

Out of sheer contrariness (and not being able to find my black electrical tape), I decided to use blue 3m painter's tape to test blocking the top row and reducing fan speed. For testing purposes, it is probably better than both electrical tape and duct tape (easier removal with less residue) :p

Dropped fan mode to "standard speed" after taping over the extra bays. RPMs are at 2700. Over the course of two hours, temp of /dev/da7 increased from 31C to 37C. Temps got up to 39C and so I boosted the fan mode back to "full". No joy.