Data Rebuild finished - drive still has no old data.

[shabos]

Hi

 

I wanted to replace an old drive that was possibly failing, and so I put in a new one. It was then immediately "unmountable file system". So I formatted it - then I started the data rebuild.

 

The rebuild took 2 days and has just finished - the drive is still empty!!!!

 

Please help.

 

Thanks

bitpartnas-syslog-20230831-1709.zip

[JorgeB]

1 hour ago, shabos said:

So I formatted it

Format is never part of a rebuild, there's a warning:

 

 

You can try mounting the old disk with the UD plugin and transfer what you can.

[shabos]

So why would unraid mark a brand new disk as unmountable when it has never been formatted?

[itimpi]

16 minutes ago, shabos said:

So why would unraid mark a brand new disk as unmountable when it has never been formatted?

It was NOT marking the new disk as unmountable - it is the emulated one.    
 

The correct handling of unmountable drives is covered here in the online documentation accessible via the ‘Manual’ link at the bottom of the GUI or the DOCS link at the top of each forum page.

 

[shabos]

No dude - it was marked as emulated and unmountable. I am a software engineer that has been using plex for 10 years - I'm not making this up - since the last few updates I have noticed a ton of errant behaviour - and the problem is its not reflected in the logs.

[JorgeB]

7 minutes ago, shabos said:

it was marked as emulated and unmountable.

Like mentioned the correct solution for that is usually to check filesystem.

[itimpi]

33 minutes ago, shabos said:

No dude - it was marked as emulated and unmountable.

Exactly what I said - it is the emulated disk that is unmountable - nothing to do with its replacement at that point.

[shabos]

Several problems with this:

 

1) When I started rebuilding the drive from parity it still said "unmountable" - not "rebuilding" or anything - I wasn't sure it was doing the right thing - so I canned it - this is poor UI

2) Once I formatted it - it still let me rebuild from parity. Why?? So then it merrily "rebuilt" for 2 days and did absolutely nothing in the end - poor design to still allow the rebuild button if it will only spin my entire array for 2 days to achieve nothing.

 

Both of these issues are poor design and UI feedback - previously when I have installed a brand new unused drive and purposefully replaced a failed one, it would give the correct feedback (not "unmountable") - although that was on reiserfs - maybe different prompts for XFS?

 

Frustrating to say the least.

[JorgeB]

2 hours ago, shabos said:

it still let me rebuild from parity. Why??

Because the disk was still disabled, and it needs to be rebuilt to make the array healthy again, parity has no concept of data or filesystem, it's just bits.