Recently I am starting to get an error (irq 16: nobody cared) I restarted my server and the issue goes away about 5 hours later it happens again. I have noticed that my read and write speeds are CRIPPLED with this error. Nothing R/W past 2MBps.

[sourCream]

Im cant find any info on what might be causing this error. Should i try booting irqpoll option? if so how do i do that. From what i can tell is it something with the motherboard or maybe a BIOS setting. Before i upgraded from 6.3.2 i had the issue a few times but it never caused any issues i dont think.

 

 

 

[Here is the log snapshot](http://imgur.com/a/kT21H)

 

[Motherboard](http://www.dfi.com.tw/products/product.html?productId=461)

 

[SAS Card](https://www.amazon.com/gp/product/B005B0Z2I4/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1)

 

 

Apr  5 21:24:29 Atlantis kernel: mdcmd (41): spindown 0

Apr  5 21:24:30 Atlantis kernel: mdcmd (42): spindown 29
Apr  5 22:28:20 Atlantis kernel: mdcmd (43): spindown 1
Apr  5 22:28:21 Atlantis kernel: mdcmd (44): spindown 2
Apr  5 22:33:17 Atlantis emhttp: cmd: /usr/local/emhttp/plugins/dynamix/scripts/tail_log syslog
Apr  5 22:36:34 Atlantis kernel: irq 16: nobody cared (try booting with the "irqpoll" option)
Apr  5 22:36:34 Atlantis kernel: CPU: 4 PID: 0 Comm: swapper/4 Not tainted 4.9.19-unRAID #1
Apr  5 22:36:34 Atlantis kernel: Hardware name: To be filled by O.E.M. To be filled by O.E.M./SB630-CRM, BIOS 4.6.5 04/30/2013
Apr  5 22:36:34 Atlantis kernel: ffff88061e303ec8 ffffffff813a3bf2 ffff8806004fd200 ffff8806004fd200
Apr  5 22:36:34 Atlantis kernel: ffff88061e303ef0 ffffffff810863e1 ffff8806004fd200 0000000000000000
Apr  5 22:36:34 Atlantis kernel: 0000000000000010 ffff88061e303f28 ffffffff810866aa ffff8806004fd200
Apr  5 22:36:34 Atlantis kernel: Call Trace:
Apr  5 22:36:34 Atlantis kernel: <IRQ> 
Apr  5 22:36:34 Atlantis kernel: [<ffffffff813a3bf2>] dump_stack+0x61/0x7e
Apr  5 22:36:34 Atlantis kernel: [<ffffffff810863e1>] __report_bad_irq+0x2b/0xb4
Apr  5 22:36:34 Atlantis kernel: [<ffffffff810866aa>] note_interrupt+0x1a0/0x22e
Apr  5 22:36:34 Atlantis kernel: [<ffffffff81084294>] handle_irq_event_percpu+0x3d/0x46
Apr  5 22:36:34 Atlantis kernel: [<ffffffff810842d3>] handle_irq_event+0x36/0x54
Apr  5 22:36:34 Atlantis kernel: [<ffffffff810871f6>] handle_fasteoi_irq+0x90/0xf8
Apr  5 22:36:34 Atlantis kernel: [<ffffffff81020515>] handle_irq+0x17/0x1b
Apr  5 22:36:34 Atlantis kernel: [<ffffffff8101ff6a>] do_IRQ+0x46/0xc2
Apr  5 22:36:34 Atlantis kernel: [<ffffffff8167e942>] common_interrupt+0x82/0x82
Apr  5 22:36:34 Atlantis kernel: <EOI> 
Apr  5 22:36:34 Atlantis kernel: [<ffffffff81551f5a>] ? cpuidle_enter_state+0xfe/0x156
Apr  5 22:36:34 Atlantis kernel: [<ffffffff81551fd4>] cpuidle_enter+0x12/0x14
Apr  5 22:36:34 Atlantis kernel: [<ffffffff8107c453>] call_cpuidle+0x33/0x35
Apr  5 22:36:34 Atlantis kernel: [<ffffffff8107c635>] cpu_startup_entry+0x13a/0x1b2
Apr  5 22:36:34 Atlantis kernel: [<ffffffff81035432>] start_secondary+0xf5/0xf8
Apr  5 22:36:34 Atlantis kernel: handlers:
Apr  5 22:36:34 Atlantis kernel: [<ffffffff814f95ff>] usb_hcd_irq
Apr  5 22:36:34 Atlantis kernel: [<ffffffffa03bf60a>] mvs_interrupt [mvsas]
Apr  5 22:36:34 Atlantis kernel: Disabling IRQ #16

 

 

 

Thanks for your time and help. 
 

 

atlantis-diagnostics-20170406-0128.zip

[JorgeB]

Irq used by the SAS2LP is getting disabled crippling its performance, check for board bios update and/or use a different pcie slot if available.

[sourCream]

Irq used by the SAS2LP is getting disabled crippling its performance, check for board bios update and/or use a different pcie slot if available.

 

So what you are saying is its my motherboard that is disabling my sas card but any idea why? I've only got one pci e on it and the bios is up to date.

 

[JorgeB]

Linux is disabling the IRQ used by the controller, not the controller itself.

[sourCream]

What exactly does that mean? This is all new to me especially the Linux side of things.

 

 

[JorgeB]

I can't tell you why it's happening, only that it is happening, try the workarounds I listed above, if none of them work replace the controller or wait for a new release, sometimes a newer kernel is enough to make it stop.

[sourCream]

So you say sometimes a new kernel can cause the issue. I believe the issue only appeared after 6.3.3. is there a was I can roll back to 6.3.2 if so how?

I do have a different motherboard​ I could swap in and try that would be last resort tho.

[JorgeB]

Copy the 3 bz* files from v6.3.2 to the flash share and reboot.

[sourCream]

Awesome, so I am back running 6.3.2 I suppose​ now only time will tell. Ive seen the error before but I don't thinks it's ever caused my speeds to drop.

If I keep getting the error would a board swap be the next best attempt?

[JorgeB]

5 hours ago, johnnie.black said:

check for board bios update and/or use a different pcie slot if available.

 

If none of those work, swap board or probably better, the controller, get one LSI based.

[sourCream]

Well that's a bummer because I got the SAS card about a month ago and I haven't seen this issue. Is there an LSI JBOD card you recommend. I don't need raid functionality or anything like that.

 

Now you said it could be a kernel issue if that's the case will switching back to 6.3.2 give me a better idea?

 

Are supermicro cards known to have issues or something?

[ashman70]

Yes Supermicro cards, specifically the SASLP and SAS2LP have been known to be problematic with unRAID. I had one in my system and it was ok for awhile then I started having all kinds of issues with it. I eventually replaced it with a Dell Perc H310 flashed to IT mode, resolved my issues.

[JorgeB]

24 minutes ago, sourCream said:

Are supermicro cards known to have issues or something?

 

Not Supermicro controllers in general, but the SASLP and SAS2LP, although most users don't have issues with them there's more than a few with issues and unRAID v6, so controllers with LSI chipset are recommended (Supermicro also has some of those, though Dell H200/310 and IBM M1015 tend to be the cheapest available).

[sourCream]

Are there any that come pre flashed in IT mode? Would you possibly have a link to one that would have that and support HDD spin down?

[ashman70]

There is a guide on here on how to flash it, its really simple. I imagine you might be able to find one pre flashed, not really sure you would have to look.

[JorgeB]

The ones I mentioned above when crossflashed to IT mode become an LSI 9210/9211-8i, you can also by those LSI models, although they are generally considerably more expensive, all support spin down.

[sourCream]

So something like this should work just fine then?
http://www.ebay.com/itm/112327269957

[JorgeB]

Yep

[sourCream]

Awesome well I'll get it and give it a shot. I may as well use this card over the Sas2lp if it works with unRAID better any way. I guess then if I still have the issue it's got to be the board no?

[JorgeB]

I've only seen this behavior (Linux disabling the controller IRQ) with the SASLP/SAS2LP, both use the same driver, never saw it with an LSI controller.

[sourCream]

Well I suppose that is good news in a way. Johnnie i really appreciate the help with all of this. I'll be sure to get that card and let you know what the outcome is. I overpaid for that SAS2LP but live and learn I'll be able to make most back if this fixes my issue. Also with IT mode I take it that is basically JBOD ? As in it reads drives just as they are no raid? And it should just be a matter of swapping the cards?

 

 

[JorgeB]

3 minutes ago, sourCream said:

Also with IT mode I take it that is basically JBOD ? As in it reads drives just as they are no raid? And it should just be a matter of swapping the cards?

 

Correct.

[sourCream]

So I have a quick question I found this one that has IT mode flashed but in the description it says it's flashed with P19 and you can ask for P20 do I need to worry about that at all? This one has a year warranty that's why I ask about this one vs the other one

[JorgeB]

Both work fine (btw, there was a problem with initial P20 release, 20.00.07.00 works fine)

[sourCream]

This is the one I found sorry I forgot to link it http://www.ebay.com/itm/291641245650