DMA read/write error!

[Big Data Guy]

Hi all,


Long time fan, and been watching this forum for a few months, before I finally build my own server.

I have my Freenas installed less than 2 days ago and having no problem, until yesterday.
For whatever reason I cannot access the server, so I have to force turn off (by holding the power button), and turn it on again.

Then I look into the /var/log/messages for clue on what's happening, and this is what I found:
May 17 21:18:15 freenas kernel: epair0a: link state changed to UP
May 17 21:18:15 freenas kernel: epair0a: link state changed to UP
May 17 21:18:15 freenas kernel: epair0b: link state changed to UP
May 17 21:18:15 freenas kernel: epair0b: link state changed to UP
May 17 21:18:15 freenas kernel: epair0a: changing name to 'vnet0.13'
May 17 21:18:15 freenas kernel: lo0: link state changed to UP
May 17 21:18:15 freenas kernel: lo0: link state changed to UP
May 17 22:18:30 freenas alc0: DMA read error! -- resetting
May 17 22:18:30 freenas alc0: DMA write error! -- resetting
May 17 22:18:30 freenas alc0: TxQ reset! -- resetting
May 17 22:18:30 freenas alc0: could not disable RxQ/TxQ (0xffffffff)!
May 17 22:18:30 freenas alc0: could not disable Rx/Tx MAC(0xffffffff)!
May 17 22:18:30 freenas alc0: MAC reset timeout!
May 17 22:18:30 freenas alc0: master reset timeout!
May 17 22:18:30 freenas alc0: reset timeout(0xffffffff)!
May 17 22:18:30 freenas alc0: phy write timeout : 29
May 17 22:18:30 freenas alc0: phy write timeout : 30
May 17 22:18:30 freenas alc0: phy read timeout : 16
May 17 22:18:30 freenas alc0: phy write timeout : 16
May 17 22:18:30 freenas alc0: phy write timeout : 4
May 17 22:18:30 freenas alc0: phy write timeout : 9
May 17 22:18:30 freenas alc0: phy write timeout : 0
May 17 22:18:30 freenas alc0: phy read timeout : 0
May 17 22:18:30 freenas alc0: phy write timeout : 4
May 17 22:18:30 freenas alc0: phy write timeout : 9
May 17 22:18:30 freenas alc0: phy write timeout : 0
May 17 22:18:30 freenas alc0: phy read timeout : 1
May 17 22:18:30 freenas alc0: phy read timeout : 1
May 17 22:18:30 freenas alc0: phy read timeout : 0
May 17 22:18:30 freenas alc0: phy read timeout : 17
May 17 22:18:30 freenas alc0: could not disable RxQ/TxQ (0xffffffff)!
May 17 22:18:30 freenas alc0: could not disable Rx/Tx MAC(0xffffffff)!
May 17 22:18:30 freenas alc0: DMA read error! -- resetting
May 17 22:18:30 freenas alc0: DMA write error! -- resetting
May 17 22:18:30 freenas alc0: TxQ reset! -- resetting
and it keeps repeating this until I turn it off.

Anyone have any clue why? alc0 is the name of my NIC. My network is configured with DHCP.
I checked that I do not have any scheduled task running or scheduled at that time.

My spec:
Mobo: Gigabyte Z97N-Wifi
Processor: i5-4690
Ram: 16GB non-ECC
Hard drive: 3x Seagate Ironwolf and 3x WD Red, all 4TB
Installed on a USB thumb drive mirrored

 

[Samuel Tai]

It's a bad idea to use Wi-Fi interfaces for FreeNAS.

 

[Big Data Guy]

It's a bad idea to use Wi-Fi interfaces for FreeNAS.

I agree, and I am not using WiFi. The name of the motherboard is Wifi, but I use Ethernet.

 

[Samuel Tai]

The alc0 interface is the Wi-Fi interface. You may need to disable it in the BIOS.

 

[Big Data Guy]

The alc0 interface is the Wi-Fi interface. You may need to disable it in the BIOS.

I'm pretty sure it's not using Wi-Fi however, because then I would have to use my passkey, which I never done that.
The Mobo have 2 LAN Ethernets, perhaps that is why it is named alc0.

 

[Samuel Tai]

My apologies, you're correct. However, that's not really a supported NIC for FreeNAS. Experience has shown Intel NICs work best. If you can get an Intel NIC, and disable the motherboard Atheros NICs, you'll have a better experience.

 

[Jailer]

The Mobo have 2 LAN Ethernets, perhaps that is why it is named alc0.

Correct. The other onboard is an Intel NIC, use that one and disable the Atheros NIC as @Samuel Tai said.

 

[Big Data Guy]

I see, I will try that and update if it still hapening.

Thank you all.