2 disks disabled

[steve1977]

One disk (disk 13) failed on me (for a cable failure) and I have been rebuilding on the same disk as the SMART test was fine.

 

During the parity rebuild, a second disk (disk 12) failed on me.

 

Now, one disk shows with "red cross" (disk 12), while the other disk (disk 13) shows with "yellow" (content emulated).

 

I mounted both disks individually and both seem to show all content.

I don't think I can recreate with parity, but was thinking that I may be able to do a "new config". I'd assume something must get lost as the new parity started to build, but wondering whether this approach would lead to more destructive corruption of some form?

 

Advice appreciated!

[JorgeB]

22 minutes ago, steve1977 said:

I'd assume something must get lost as the new parity started to build

Any data rebuilt after the second disk failed will be corrupt, but if you do a new config you can re-enable both disks, parity will need re-syncing.

[steve1977]

Cool, thanks! Let me do this.

Not urgent, but given my intelectual curiosity. Why didn't disk 13 get "wiped"? Array was right in the middle of rebuilding, so I am positively surprised that the emulated content still exists although basically two disks "failed".

[JorgeB]

The metadata part of the filesystem should be OK, so data will most likely look fine and complete, but any data that was rebuilt past disk12's failure will be corrupt/unavailable when you try to access it.

[steve1977]

Got it, this makes sense. Any idea how I can spot corrupt data that I can delete it?

[JorgeB]

You'd need previously created checksums (or be using btrfs), without that you'd need to compare all files to known good ones or try them one by one.

[steve1977]

Ok, thanks!