jonny_blaze Posted December 1, 2023 Share Posted December 1, 2023 My server is having major issues with constant UDMA CRC read errors. Now my parity drive and disk 2 are said to be bad. The array will not boot. I ran an extended Smart test on disk 2 and its said that its fine. Now I am at a loss as I need this server to either boot with disk 2 so I can replace the parity drive or with the parity drive so i can rebuild the array. Also was wondering if my SAS card could be causing all these errors and if I should replace it. Is there any way to get unraid to ignore the udma errors and just boot? I am kind of a noob with unraid. I posted my diagnostic files here. ares-diagnostics-20231130-2359.zip Quote Link to comment
JorgeB Posted December 1, 2023 Share Posted December 1, 2023 Start by updating the LSI firmware to latest since that's very old, if that doesn't help replace the SATA cables. Quote Link to comment
itimpi Posted December 1, 2023 Share Posted December 1, 2023 3 hours ago, jonny_blaze said: My server is having major issues with constant UDMA CRC read errors. CRC errors indicate connection errors. Since CRC error counts are stored internally to the drive they never reset to 0 so you can only stop them increasing. You can ask Unraid to only tell you about changes by clicking on the Orange icon for the drive on the Dashboard and selecting the Acknowledge option. In the vast majority of cases it is the power or SATA cabling to the drive causing the CRC errors to occur, although as was mentioned old LSI firmware seems to sometimes cause this to happen when it should not. A quick way to check the cabling is to swap it with another drive and see if the errors follow the drive or the cabling. Quote Link to comment
jonny_blaze Posted December 21, 2023 Author Share Posted December 21, 2023 well I changed out the SAS card and cables and now my parity drive and disk 2 will not be recognized by Unraid. Do I have to change out the drives and lose the data that was on disk 2? Or do I need to start fresh and clear out all the drives? I am relatively lucky as I do have a back up server that has most of but not all the data lost. Could there be other issues with the MB or something else I am not thinking of? Your help would be most appreciated. Thank you. Quote Link to comment
trurl Posted December 21, 2023 Share Posted December 21, 2023 Attach new Diagnostics to your NEXT post in this thread. Quote Link to comment
jonny_blaze Posted December 21, 2023 Author Share Posted December 21, 2023 ok here are my diagnostics. I thought of a work around. I was able to mount the disk with unassigned devices, share the drive and pull the data off the drive to a usb hdd. But this just tells me the drive is probably still good and that if I replace it with a new drive and a new parity drive, whos to say this wont continue to happen? ares-diagnostics-20231220-2056.zip Quote Link to comment
JorgeB Posted December 21, 2023 Share Posted December 21, 2023 I assume this was disk2? Device Model: WDC WD100EMAZ-00WJTA0 Serial Number: 1EG1N5GZ If yes it looks healthy, you can do a new config, assign it and re-sync parity. Quote Link to comment
jonny_blaze Posted December 22, 2023 Author Share Posted December 22, 2023 Well I am kind of a noob ….how do I do that? Quote Link to comment
itimpi Posted December 22, 2023 Share Posted December 22, 2023 5 hours ago, jonny_blaze said: Well I am kind of a noob ….how do I do that? Tools->New Config. That tool is mentioned here in the online documentation accessible via the Manual link at the bottom of the Unraid GUI. In addition every forum page has a DOCS link at the top and a Documentation link at the bottom. The Unraid OS->Manual section covers most aspects of the current Unraid release. Quote Link to comment
jonny_blaze Posted January 9 Author Share Posted January 9 Just a follow up, I was able to do a reconfig and add the drive back into the array. I was also able to do a parity sync and everything seems back to normal now. I guess the issue was either with the old SAS card or its cables. I replaced both with newer versions. Thanks to everyone who helped me figure this out. Quote Link to comment
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