It's been a few years since I've been to this forum and I'm not sure where to start looking.  My unraid server has been running without issue for several years.  Last night it locked up.  When I restarted the server a parity check started and has found 8 errors so far.  Can someone point me to info on this website on how to deal with parity errors?  I'm thinking that I now have one or more files on my server that are now corrupted.  Before I ask specific questions I wanted to do some catching up but there is a lot of info on this site.  Is there a faq that deals with parity errors?

 

Thanks,

Greg

A few sync errors after an unclean shutdown are normal, run a correcting check.

If you want to play even safer you can stop the array; restart in Maintenance mode; and then click on each disk in turn on the Main tab to run a file system check.   This should ensure that each disk is a consistent state.

 

as was stated a small number of errors when running a parity check after an unclean shutdown due to writes in progress at the time not completing successfully on all drives.   Simply let the system correct them.   If you get lots of errors then it is probably worth asking for advice.

It seems I was hasty on shutting down my system.  It wasn't actually locked up, I have a bad drive and I think it was retrying to read or write the disk.  

Seeing these errors:

» reallocated_sector_ct=12000

» reported_uncorrect=1081

» current_pending_sector=52736

» offline_uncorrectable=52736

» ata_error_count=1081

 

Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error

# 1 Short offline Completed: read failure 90% 40938 284536536

 

 

I assume at this point the only thing to do is replace the drive and let it rebuild?  Is there anyway to tell if any files are corrupted after the rebuild completes and system is back up and running?

Edited July 23, 20196 yr by wazkaren
More info

9 hours ago, wazkaren said:

I assume at this point the only thing to do is replace the drive and let it rebuild? 

Yep

 

9 hours ago, wazkaren said:

Is there anyway to tell if any files are corrupted after the rebuild completes and system is back up and running?

Only if you have checksums for all files or are using btrfs.

Thanks.

21 hours ago, wazkaren said:

» reallocated_sector_ct=12000

» reported_uncorrect=1081

» current_pending_sector=52736

With those kind of numbers, yeah you have to replace the drive and hope for the best.  You should enable notifications for unRaid.  You would have been informed way before those numbers got out of hand.