The fan should blow air onto the heatsink.
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Thank you @Otanaut
Either way. I prefer to blow into the heatsink as it seems to get better dispersion of the airflow. Drawing out can result in uneven airflow depending on what is around the heatsink.
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Roger that @wrenchbender Make perfect sense. Have a wonderful evening Ed.
Unfortunately, I waited a week for these screws to arrive. Obviously, they are about 5mm too long. My mistake. I should have taken measurements before placing the order. Looks like itās back to the drawing board.
You got the thin fan, not sure how long the bolts for that one are.
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Hello again Ed @wrenchbender. I trust that you had a wonderful week.
I didnāt know that there was a thicker fan. I searched for the fan using the criteria that you see in the attached photo and came up with the NF-A4x10. I went out today and bought a pack of the 20mm and 25mm screws just in case. The other dilemna that I am having is that the 4-Pin connector on the fan or extension cable does not seem to be compatible with the aux fan connector on the mobo of my HP Z820. I may have to shave off those two alignment guides on the plastic casing. Pics attached.
In your opinion do you think that it would more advantageous for me to use the larger 40x40x20mm model instead? If so, I have no problem ordering that one instead.
It seems your Z820 is built like a server with forced cooling and shrouds for air control. If your machine is original with the shroud over the expansion slots and the 2 fans in the lower portion of the front of the case, then you probably have enough air flow to cool the card.
The fan connectors on that motherboard are not standard, so the connector will have to be modified to fit.
Suggest you hook up a drive or 2 to the card and power it up with all the shrouds and case covers installed. If the card overheats you will know it pretty quick, the alarm is loud.
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Hello Ed @wrenchbender. I hope that your Sunday has been great so far. Yes, the Z820 is totally original with all the cooling shrouds installed. I did notice that the aux fan connectors on the HP MOBO are not standard so I will shve down the center ridge on the Noctua connector. At the moment I am dealing with another issue. I have set my ASR-71605 in HBA mode but am unable to create any datastores in VMWare ESXi. It can see the Adaptec card but when I come to create a new datastore I am told that there are no devices with free space to create them. Perhaps HBA mode is not how the card should be set. Back to the drawing board again.
My luck seems to be going from bad to worse. I entered the Adaptec array configuration at bootup CTRL-A. I selected my 2x HGST SATA 8TB drives as RAID-0 / answered the prompts / Hit done. I get the following error. Error occurred while creating array. Error number (433). I searched the internet but couldnāt find anything.
Are you running vmware under unraid or vmware native?
Might ask some more familiar with vmware if you are running native, but I think you will need the card in raid mode. With the card set as hba you canāt create a raid-0 using the card.
Unraid users set the card to hba, as unraid handles the drives directly.
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Running ESXi native on my HP Z820. I would prefer to run the card in HBA. I am unable to create any RAID array even if I wanted to as I always get the same error. See attached pics.
Then there is the question of what cables that I am using (SFF-8643). I am not sure if I they are the Forward or Reverse type. I also installed Windows Server, Windows 10, TrueNAS until I was too physically and mentally exhausted to continue. I am so discouraged.
First of all, I also posted this in the DAS discord channel, so apologies if anyone is seeing this twice.
I am looking for any input on a strange issue I am having with ādisappearing disksā attached to my asr-7805.
I have the card running in an HP-290, with updated firmware, set to HBA mode. I have sas cables running outside of the case to a Custom DAS box with 4 HDDs. Note, the DAS has independent power, and all 4 disks appear to be spinning.
When I power the system on and check for disks (lsblk, fdisk, etc.) I see anywhere from 0-4 HDDs recognized by the OS. However, after a few minutes that number slowly drops until no disks are recognized.
Any input is much appreciated, as always!
Update #1
I now am able to consistently see all 4 discs after a full reboot. I am able to wipe them, but when I initialize the disks with GPT (proxmox gui) 1 drive always disappears.
This led me to think that it is a problem with one of the drives, but further investigation shows that it is not the same disk that drops each time.
After some conversation on the DAS discord channel, I also repasted the heatsink. This does not seem to change anything. With the noctua fan attached, the card stays warm to the touch, but not uncomfortably hot.
Next step is to try the card in another host. More to come.
Update #2:
The second host test was inconclusive.
However, upon further discord discussion, @stuffwhy pointed out that although the picopsu I am powering the 4 drives with is rated for 150w, the 12v rail may not be rated for that full throughput. Turns out, they were absolutely right:
Each drive is rated for 1A @ 12V, and the two cooling fans combined pull 0.5A @ 12V, for a total of ~4.5A @ 12V.
Even though this is below the rated 6A sustained draw for the 12V rail on this particular PicoPSU, I suspect either the AC/DC brick I am using is of poor quality, or the aging SAS drives are exceeding their rated draw.
I ordered a higher quality combo of a picopsu & ac/dc brick from mini-box: PicoPSU-160-XT with 192W Adapter Power Kit
I will update when it arrives.
Final update
I ordered both the above linked combo, as well as this: RGEEK 24pin DC ATX PSU 12V DCā¦ Amazon.com
Both of these solutions work well, and completely solve the ādisappearing disksā issue. This confirms that my original issue came from an insufficient 12V rail on the PSU feeding the disks in my tabletop DAS enclosure.
Thanks again to everyone that helped find this solution!
Did you ever figure out how to get the disks to spin down? Running in to a similar issue with SAS cards running off of my ASR-7805.
Iām also running into spin down issues with my ASR-8885.
The disks report spun down in Unraid 6.12.10. (though I didnāt verify theyāre physically spun down). Then on spin-up, whatever r/w fails, the disk reports thousands of errors, and drops off the array.
I updated to the latest firmware using arcconf, which didnāt resolve it. Iāve verified thereās enough airflow, so itās not heat. The card is in HBA mode, these are all SAS drives, +3.3v is disconnected.
At this point I donāt know thereās annoying more to be done. Iām back on an LSI SAS2 card due to the issue, unfortunately.
Hello!
I have this ASR-7165 HBA and i have SAS drives. are they going to cause any problem?