Hello,

 

I recently upgraded to 6.2, although I am thinking that is not related to this issue.

 

I was copying files to a share on my unRaid server when it the process failed.  Looking at the server, my Disk 1 is now shown as "Unmountable", with a file system status of "Unmountable - No file system (32)".

 

The main screen shows that I can format the unmountable drive, but before I do that I'm really hoping to be sure I have the steps right.

 

I really hope to save the data on the drive.  Is the right order to format the drive and then, once that is done, will I see an option to rebuild the array using the parity drive?

 

If that's not correct, is there a way to bring that drive back online and then rebuild the missing data? 

 

I have attached the diagnostic files.  I didn't spot any issues, but I really have no idea where to look.

 

Any help that can be offered will be GREATLY appreciated!

 

Thank you,

Scott

tower-diagnostics-20160920-1031.zip

Don't format or you'll lose all data.

 

You need to run xfs_repair on disk1:

 

https://lime-technology.com/wiki/index.php/Check_Disk_Filesystems#Drives_formatted_with_XFS

 

 

I've added this to the Additional Upgrade Advice.

Thanks, Johnnie!!

 

That was a HUGE help.  I'm not very familiar with Linux so it takes me a while to figure things out :-)

 

I ended up using the xfs_repair command with the -L option (xfs_repair -L /dev/md1) which, according to the output, may have lost some metadata changes.  A lost+found folder was created on Disk1 but it contained just 1 empty file.

 

I am SO glad I asked before formatting the disk and even more glad that you responded so quickly! 

 

Things seem to be back to normal (although I will run a parity check).  Thanks again for your help!!