Questions on replacing data drive

[wayner]

My array has a data drive (disk 2) that has failed (SMART tests say "A mandatory SAMRT command failed:  exiting.  To continue, add one or more '-T permissive' options"), but it seems that the data is still good as it is emulated thanks to the parity drive.  When I remove this drive from the array and put in a new drive 2, and then start the array, will it automatically rebuild the data on disk 2?  But will it then start automatically rebuilding the parity drive?

 

I am replacing a 4TB with another drive of the same size.

 

This isn't clear from the docs (https://docs.unraid.net/unraid-os/manual/storage-management/#replacing-faileddisabled-disks)

 

 

[itimpi]

1 minute ago, wayner said:

drive.  When I remove this drive from the array and put in a new drive 2, and then start the array, will it automatically rebuild the data on disk 2

Yes

2 minutes ago, wayner said:

But will it then start automatically rebuilding the parity drive

Why you would think this needed?   Parity has just been used as part of the rebuild process so by definition it is correct.

[wayner]

I guess, you are correct, parity would be valid once the rebuild is complete.  I thought it would have to start over from scratch, but I guess was wrong.  My bad.