Very slow rebuilt times (2 failed disks) (SOLVED)

[ngick]

Hello to everyone!

I have an Unraid 6.9.2 with 13 disks and two parity disks .

The problem is that I had 1 failed disk from the 13, and now that I am trying to rebuilt a new disk in place, My first parity has errors that are increasing fast and the speed of the rebuilt is dropped to 400KB/sec.... It says that it needs 180 days to finish rebuilding the new 6TB disk...

 

What can I do? Could I disable the first parity and still able to recover my failed disk?

 

Thank you for your time!!!

 

[JorgeB]

Please post the diagnostics.

 

 

[ngick]

Oh Yes ofc!

I Posted those now...

The news are that now my 1st parity is disabled so the disk rebuilt is now fast around 110MB/sec...

I am not quite sure that the data will be ok though...

Thank you very much for your time, I appreciate it.

cupnas-diagnostics-20220518-0956.zip

[JorgeB]

Parity disk appears to be really failing so you'll also need to replace that one, but the rebuilt disk should be 100% OK as long as no more errors on a different disk, when Unraid fails to read a sector form parity1 it will use parity2, it just took longer with all the errors, but parity2 saved your butt in this case.

[ngick]

Thank you very much for your answer...

I just wanted to write that I had checksums from the files, so I checked all the files again, when the rebuilt finished, and all files where fine!!! 

This second parity truly saved my butt!