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Random Slow Parity Check

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So I had this issue of very slow parity checks a few months ago, then I had a couple months where they went at normal 80mb/s speeds.  Now the last few have been slow again 2 mb/s range.  I've tried swapping out my sata card, which I recently changed when I did a motherboard and processor update, and it made no difference. Also, I just went through today and made sure all my cables were tight and seated. Any help or places to start looking would be appreciated. 

 

Occasionally, I also get a very slow file transfer as well which I assume is a related issue to this.

syslog.txt

unRAID-6.2.4.txt

unraid-diagnostics-20170105-1549.zip

For V6, instead of syslog you should always post the complete diagnostics zip by going to Tools - Diagnostics.

  • Author

Think I did that now. Thanks

IRQ16 was disabled, it's used by the SASLP, this explains the parity check speed slowing to a crawl, rebooting will fix but it will probably happen again.

 

Try bios and/or firmware updates and using the SASLP in a different slot if available.

  • Author

Rebooting does not help, did that several times today. So you think I need a bios update for my motherboard or the SASLP?

Reboot will help until it happens again, and it can be almost immediately  :) , look for this in your syslog:

 

Jan  5 15:11:11 unraid kernel: irq 16: nobody cared (try booting with the "irqpoll" option)
Jan  5 15:11:11 unraid kernel: CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.4.30-unRAID #2
Jan  5 15:11:11 unraid kernel: Hardware name: MSI MS-7850/Z97 PC Mate(MS-7850), BIOS V4.10 08/11/2015
Jan  5 15:11:11 unraid kernel: 0000000000000000 ffff88021fb03e70 ffffffff8136f79f ffff8800d4dd1800
Jan  5 15:11:11 unraid kernel: 0000000000000000 ffff88021fb03e98 ffffffff8107f8ce ffff8800d4dd1800
Jan  5 15:11:11 unraid kernel: 0000000000000000 0000000000000010 ffff88021fb03ed0 ffffffff8107fb9b
Jan  5 15:11:11 unraid kernel: Call Trace:
Jan  5 15:11:11 unraid kernel: <IRQ>  [<ffffffff8136f79f>] dump_stack+0x61/0x7e
Jan  5 15:11:11 unraid kernel: [<ffffffff8107f8ce>] __report_bad_irq+0x2b/0xb4
Jan  5 15:11:11 unraid kernel: [<ffffffff8107fb9b>] note_interrupt+0x1a0/0x22e
Jan  5 15:11:11 unraid kernel: [<ffffffff8107d8d1>] handle_irq_event_percpu+0xe2/0xf0
Jan  5 15:11:11 unraid kernel: [<ffffffff8107d915>] handle_irq_event+0x36/0x54
Jan  5 15:11:11 unraid kernel: [<ffffffff810803c5>] handle_fasteoi_irq+0x8c/0xf4
Jan  5 15:11:11 unraid kernel: [<ffffffff8100e0e8>] handle_irq+0x17/0x1b
Jan  5 15:11:11 unraid kernel: [<ffffffff8100db3e>] do_IRQ+0x46/0xc2
Jan  5 15:11:11 unraid kernel: [<ffffffff8162a6c2>] common_interrupt+0x82/0x82
Jan  5 15:11:11 unraid kernel: <EOI>  [<ffffffff81508581>] ? cpuidle_enter_state+0xf0/0x148
Jan  5 15:11:11 unraid kernel: [<ffffffff8150853a>] ? cpuidle_enter_state+0xa9/0x148
Jan  5 15:11:11 unraid kernel: [<ffffffff815085fb>] cpuidle_enter+0x12/0x14
Jan  5 15:11:11 unraid kernel: [<ffffffff810765ca>] call_cpuidle+0x4e/0x50
Jan  5 15:11:11 unraid kernel: [<ffffffff81076752>] cpu_startup_entry+0x186/0x1fd
Jan  5 15:11:11 unraid kernel: [<ffffffff81033d5f>] start_secondary+0xf4/0xf7
Jan  5 15:11:11 unraid kernel: handlers:
Jan  5 15:11:11 unraid kernel: [<ffffffff814b1e61>] usb_hcd_irq
Jan  5 15:11:11 unraid kernel: [<ffffffffa009560a>] mvs_interrupt [mvsas]
Jan  5 15:11:11 unraid kernel: Disabling IRQ #16

Bios update for the board and changing slot it's what usually works best, try a different slot first if you can.

  • Author

Ok, Thanks. I switched to the PCI E2 slot instead of the PCI E4 and started another parity check.  It's around 50mb/s so far.

 

Is that going to be a slower slot than the other?  Should I do a bios update to get it working in the PCI E4 slot?

  • Author

Running at 100mb/s now. Problem solved! Thanks!

What did you do to fix it? It might help someone else with a similar problem.

 

  • Author

Well, I take it back. Ran great for about 15 minutes and then slowed to 2.7MB/s. Guess I need to try the bios update as I only have the 2 PCI slots available.

unraid-diagnostics-20170105-1654.zip

Is there any point in trying the "irqpoll" boot option referred to in the error message? This suggests it might help where all else has failed, but obviously try a BIOS update first.

Worth a shot, upgrading to v6.3-rc may also work, would try that first if the bios update doesn't fix it.

  • Author

Updated my bios and I'm 30 minutes into a parity check and haven't had the error yet.  So far so good.

 

I will look into those options if I have more issues.  Thanks guys.

  • Author

The check finished without the irq error. Averaged 80MB/s. Thanks for the help again...

  • 7 months later...
  • Author

I'm still having this IRQ16 disabled issue.  I've changed slots for the SASLP, upgraded motherboard bios, replaced SASLP with a SAS2LP, and also tried irqpoll boot option which gave me an endless barrage of log errors.  Any other ideas before i replace the motherboard?

unraid-diagnostics-20170807-1449.zip

Not related to your issue, but you have Community Repositories installed.  Uninstall it and install Community Applications.

 

Seriously doubt if CR will work under 6.3.5 and may have adverse effects on the docker tab.

  • Author
2 minutes ago, Squid said:

Not related to your issue, but you have Community Repositories installed.  Uninstall it and install Community Applications.

 

Seriously doubt if CR will work under 6.3.5 and may have adverse effects on the docker tab.

Done. Thanks.

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