First Parity errors in almost 6 years!

[DjSamLb]

After using UNRAID with zero issues and loving it for so long,

today I received that the monthly parity check returned 1194 errors

I must add that this month I swapped out the cpu and added an SSD and a GPU passthroughed to a VM

no other changes

I also noticed that my second parity drive is connected via SATA2 and not 3 no idea if that has been all along or if it's having cable issues or maybe wrong port?

Please find attached my diags

tower-diagnostics-20200305-1020.zip

[DjSamLb]

Also noticed that dual parity are not in sync in number of reads and writes

I think I recall they were always in sync before?

 

[JorgeB]

49 minutes ago, DjSamLb said:

Also noticed that dual parity are not in sync in number of reads and writes

That's normal, any unclean shutdown since previous check?

[DjSamLb]

2 minutes ago, johnnie.black said:

That's normal, any unclean shutdown since previous check?

None, or at least not that I know of

I should probably mention that the VM first was using the Cache but then due to heavy I/O I moved it to a dedicated SSD passhtroughed

Dno if that might be the culprit 

 

[JorgeB]

1 minute ago, DjSamLb said:

I should probably mention that the VM first was using the Cache but then due to heavy I/O I moved it to a dedicated SSD passhtroughed

Parity is only for the array, so can't be that, I would suggest running a couple of more checks, if there are more errors there's definitely a problem.

[DjSamLb]

1 minute ago, johnnie.black said:

Parity is only for the array, so can't be that, I would suggest running a couple of more checks, if there are more errors there's definitely a problem.

Ok will do that

And if the exact same amount of errors that would be a one time thing? just run check with fix parity?

[JorgeB]

17 minutes ago, DjSamLb said:

And if the exact same amount of errors that would be a one time thing?

Last check was already correct, no next one should find 0 errors.

[DjSamLb]

Ok already started it; will report back in 18 hours

thanks a lot for the great help!

6 hours ago, johnnie.black said:

Last check was already correct, no next one should find 0 errors.

 

[DjSamLb]

@johnnie.black First run had zero errors

Gonna do another run next week just to be sure

Do u think it's a one time glitch? anything in the diags flagged?

 

16 hours ago, oliverm said:

Thanks. Very interesting question. I have same problems.

Did u try running more scans?

[JorgeB]

2 hours ago, DjSamLb said:

Do u think it's a one time glitch? anything in the diags flagged?

There must be a reason for the errors, most obvious would be an unclean shutdown some time before this check, another possibility is one of the disks returning corrupted data, that's not supposed to happen but it is known to happen on some rare occasions.

[DjSamLb]

1 minute ago, johnnie.black said:

There must be a reason for the errors, most obvious would be an unclean shutdown some time before this check, another possibility is one of the disks returning corrupted data, that's not supposed to happen but it is known to happen on some rare occasions.

So u think I have nothing to worry about? I'll still run another check next week just to be safe

 

Thanks a lot for all the help!

[JorgeB]

If it was an unclean shutdown you're fine, and it's the most likely, if it was a disk returning bad data not so good since there would be some data corruption, but like mentioned that is pretty rare.

[trurl]

20 hours ago, oliverm said:

Thanks. Very interesting question. I have same problems.

If you want help you should start your own thread and post your diagnostics.