Data Disk replaced - Rebuild finished with 85848 errors

[Nico_S]

Hey there,

 

yesterday I decided to upgrade my 2 TB HDD to a 4 TB HDD.

Before doing so, I backed up everything, ran a parity check and all was fine (0 errors).

Not too long ago, I did an extended SMART test for the parity disk. Again, everything was fine.

After swapping the discs, the rebuild speed was >100 MB/s.

When I woke up, there were quite some emails with "unRAID Status: Warning [UNRAID] - current pending sector is xxx" and the rebuild process slowed down to < 1MB/s.

A few hours later, the rebuild finished with 85848 errors.

The parity disk now has 337 current pending sectors ( 0 Reallocated sector count).

 

I already ordered a new HDD to replace the parity disk.

 

Now my questions:

What is the best way to get a perfectly running system again?

Can I even trust the data that was written during the rebuild or should I erase the whole disc and copy all data from my backup?

When I replace the parity disc, do I have to create a new config to rebuild the parity?

 

unRAID version: 6.6.5

diagnostic file is attached

 

Thank you very much in advance!

Cheers,
Nico

unraid-diagnostics-20181126-1922.zip

[JorgeB]

Rebuilt disk will have some corrupt data, best way forward would be to put the old disk back, also a new parity disk, do a new config and resync parity.

[Nico_S]

Thank you very much for the quick reply! The new HDD should arrive tomorrow. I will update the thread then.