My system: 5 Disks + 1 Parity 

Problem disk: sdc disk6 

 

Dec 7 14:59 Start Array, everything is normal,  watching Movie

Dec 7 15:31 Movie file lost, and I find "Metadata CRC error detected at xfs_agfl_read_verify+0x80/0xc9 [xfs], xfs_agfl block 0x3 " from syslog

Dec 7 15:37 Shutdown system 

Dec 7 15:39 Start system again

Dec 7 15:40:47 disk6 unmount and run xfs repair when reboot system 

 

 

After that I try to reboot system and array many times. but didn't work. So I format disk6 and hope my data could be rebuilt ( because I think pairty disk could be ).

 

There are about 1-2T data on Disk6, How could I get it back? 

 

Thank U~~

syslog.txt

Check file system on disk6

https://wiki.unraid.net/Check_Disk_Filesystems

 

Next time please post complete diags (tools -> diagnostics)

 

 

there is diags 

tower-diagnostics-20191207-0957.zip

Disk looks fine, just check file system.

6 minutes ago, johnnie.black said:

Disk looks fine, just check file system.

Thank U for help，but how could I rebuild my system and get my data back? 

 

So I format disk6 and hope my data could be rebuilt ( because I think pairty disk could be ).

Ohh, I missed this, format is never part of a rebuild, it deletes all data on the disk and updates parity.

 

The correct way to fix your problem would be to check filesystem, not rebuild.

 

Now, only option is to restore from backup or use a file recovery util like UFS explorer.

 

 

So, I shouldn't format my disk, it's my mistake. 

 

But after format my disk and reboot system, the disk still "Unmountable: Unsupported partition layout" ...

 

 

Format again, it still the same grab and post new diags.

8 minutes ago, johnnie.black said:

Format again, it still the same grab and post new diags.

OK，I will format it again.