Degraded disk replacement problem: boot hangs after clearing CMOS

[NAS-Carl]

Hello,

Build information

Motherboard: Asrock E3C236D4U​

Hard Disks: 4x Seagate ST 4000NM0033​

​

Problem statement
TrueNAS Scale alerted me one of my drives was degraded. I offlined the drive, powered down my server, and replaced the bad drive with a new one. When I turned on my server, it hanged with message DXE PCI Bus Enumeration 93. I cleared CMOS, then restarted the server and was able to get as far as the BIOS. From there, TrueNAS started to load, but the serial console cut out at a certain point; I am managing my system via IPMI. The boot does not appear to have been successful, as I cannot reach the web interface.

I know there is more information I should provide, but I don't know how. I'm an amateur and not very experienced.

Any insights would be appreciated. Thank you.

 

[Ericloewe]

Well, let's start with the basics:

• The serial console cuts out, but what about the graphical console?
• Update the system firmware, if an update is available
• Replace the battery with a fresh one

Also, do you have any PCIe cards in the system?

 

[NAS-Carl]

Thank you for your reply.

The system firmware is up to date, and the CMOS battery is new.

I do have a couple PCIe cards in the system. One is a graphics card so I could have an HDMI connection; the motherboard only has VGA. When the serial console blanks out, I tried plugging in the HDMI but got no signal.

I should also have mentioned in my original post that I have one additional Western Digital hard disk (WD40EZRZ) in the system, plus a Samsung SSD (840 EVO) and a SK Hynix NVMe drive (BC711). The NVMe drive is my boot drive.

Here's a screenshot of the boot menu I'm able to get to:

Thanks again for your help.

 

[NAS-Carl]

PS And here's a screenshot of my BIOS main page:

 

[Ericloewe]

I do have a couple PCIe cards in the system. One is a graphics card so I could have an HDMI connection; the motherboard only has VGA. When the serial console blanks out, I tried plugging in the HDMI but got no signal.

What about the VGA output (via the physical connector or the iKVM functionality)?

 

[WI_Hedgehog]

Pull disconnect the data cable from the new drive and see if the system boots; a BIOS incompatibility (drive BIOS vs. system BIOS) can cause these symptoms. (I've actually run into this, though it's pretty rare in my experience.)

 

[NAS-Carl]

I found a workable solution, thanks to your inputs.

After clearing CMOS, I entered BIOS and disabled the onboard VGA output. @Ericloewe's question about VGA output brought this to mind as something to try. I then proceeded with the OS boot as I had before, but this time, the console remained on IPMI, so I was able to see what I was doing. TrueNAS did indeed boot up, though for some reason my network configurations no longer worked.

After resetting network configs, I was able to get back onto the web interface, at which point I redid the drive replacement. This time, I didn't actually shut down the server; I realized that I had misread the instructions in the documentation (https://www.truenas.com/docs/scale/scaletutorials/storage/pools/disks/replacingdisks/). I thought it said to shutdown the system, but it doesn't. Instead, I just offlined the faulty drive, then swapped it out with the replacement. Then I selected replace drive, and it worked! System currently resilvering the RAIDZ2.

Thanks again for your inputs, I appreciate it.