Hi everyone!

 

Contemplating on posting this but thought how others may find this helpful in a similar situation!

 

The other day I opened up unraid and found one of my drives turned off and had an "x" by the name. My initial find was that I had several "UDMA CRC error count" about 46. This leads me to believe this specific error caused my drive to become disabled; as that was the only issue I found at that time. I also completed an extended SMART test and it came back with no errors. (attaching report)

 

When this happened I turned off the system and swapped the SATA cable with the issue drive. After rebooting the system I started getting UDMA CRC errors for two of my other drives. Now this is leading me to believe something else may be wrong.

 

Here are my questions:

1. If I run the SMART extended test and it passes, is it fair to say that the problem does not reside in the drive?
2. If the SATA cables were replaced, what may be the next issue? Is there something wrong with the SATA Controller? Is there a way to check this?
3. Should I be worried of having data corruption to the drives while receiving these UDMA CRC errors?
4. What is my next move given all the information?

 

System Info:

Running the system for about 2 years...

Hardware is pretty old, see png for more info.

 

Please let me know if you need more information about the system...

OOS8000G_0002VLPT-20250415-0930.txt

3 minutes ago, Dominik Chraca said:

• If I run the SMART extended test and it passes, is it fair to say that the problem does not reside in the drive?
• If the SATA cables were replaced, what may be the next issue? Is there something wrong with the SATA Controller? Is there a way to check this?
• Should I be worried of having data corruption to the drives while receiving these UDMA CRC errors?
• What is my next move given all the information?

 

1. Passing a test isn't enough IMO, you need to look at the values and assess whether or not you have pending sectors, etc. The things that indicate the drive is dying.

2. If the cables are replaced and UDMA CRC errors are still occurring, it could be a bad controller.

3. The data should not be corrupt as the drive is essentially retrying to send the data until it does so successfully.

4. Check the controller and cables again.

 

UDMA CRC issues are a cable/controller communication issue. Should not have any affect on the health of the drive. Maybe check the drive's physical sata connector too?

Hi MowMdown,

 

Thank you for you response! I looked into the logs and found know issues with pending sectors. Only thing is there are 195 hardware resets and 64 ASR events, not sure if this is a problem or not.

 

Is there a way to check if the SATA controllers are bad?

SMART looks fine, and if the extended test passed, the disk is OK for now, for the CRC errors, note that they never reset, but if they keep increasing, replace the SATA cable and monitor.

Hi all, I am going to mark as solved. I replaced the SATA cables with brand new ones and rebuilt the disk. Looks like everything is fixed. Thank you @JorgeB and @MowMdown for the help!