Corrupt Filesystem - No Parity Drive

[Chewwwy_]

Hey There,

 

My Current Unraid set up was working beautifully and I was about to upgrade and add a parity drive. *Always the way*

 

One of my  8TB HDD seems to have a corrupt fileystem. I have tried running a XPS Repair and it has said couldnt find valid secondary superblock.

 

This is my first time posting, I am not sure what information you will need to better assist me. so Appolagies in advance.

 

I have ordered a parity drive and a replacement 8TB HDD. My questions are is there anyway I can I fix this and if not can I save the files. It also happens to be my largest HDD...

[JorgeB]

Parity couldn't help with filesystem corruption anyway, please post diagnostics after array start.

[Chewwwy_]

Hey JorgeB,

 

Thanks for your reply. Please find attached!

tower-diagnostics-20220105-1855.zip

[JorgeB]

How did you run xfs_repair?

Correct way is starting the array in maintenance mode then use the GUI or in the CLI (and since the problem is with disk4) type:

xfs_repair -v /dev/md4

 

[Chewwwy_]

I just attempted that and it has said this. I started the array in maintance mode? 

 

root@Tower:~# xfs_repair -v /dev/md4
Phase 1 - find and verify superblock...
        - block cache size set to 699752 entries
Phase 2 - using internal log
        - zero log...
zero_log: head block 2918059 tail block 2918024
ERROR: The filesystem has valuable metadata changes in a log which needs to
be replayed.  Mount the filesystem to replay the log, and unmount it before
re-running xfs_repair.  If you are unable to mount the filesystem, then use
the -L option to destroy the log and attempt a repair.
Note that destroying the log may cause corruption -- please attempt a mount
of the filesystem before doing this.

[JorgeB]

Use -L

[Chewwwy_]

so this is what it just said.

 

Maximum metadata LSN (94:2917987) is ahead of log (1:2).
Format log to cycle 97.
done

 

is it fixed?

[ChatNoir]

8 minutes ago, Chewwwy_ said:

is it fixed?

Start the Array in normal mode and check the file on disk. Is everything there and working ?

Is there a Lost+Found directory at the top level of the drive ?

 

Attach new diagnostics.

[Chewwwy_]

tower-diagnostics-20220105-2327.zip

 

Most of it seems to be there! I will have to go through, there seems to be a Lost+Found folder. it has a bunch of thumbnails of photos I have stored.... They are all like 43kb.

[JorgeB]

1 hour ago, Chewwwy_ said:

Lost+Found folder

 

Not that uncommon with filesystem corruption, take a look to see if there's anything important/salvageable there.

[Chewwwy_]

How do i prevent this in the future? or put a system in place so if it does i dont loose data

 

[trurl]

31 minutes ago, Chewwwy_ said:

How do i prevent this in the future? or put a system in place so if it does i dont loose data

 

You should replace disk4.

Serial Number:    WCT01875
ID# ATTRIBUTE_NAME          FLAGS    VALUE WORST THRESH FAIL RAW_VALUE
  5 Reallocated_Sector_Ct   PO--CK   100   100   010    -    64
187 Reported_Uncorrect      -O--CK   044   044   000    -    56
197 Current_Pending_Sector  -O--C-   100   100   000    -    168
198 Offline_Uncorrectable   ----C-   100   100   000    -    168

 

Since you don't have parity yet there is no way to rebuild to another disk so you will have to copy its files off. I don't suggest trying to build parity with that disk in the array. After you get parity built you could mount that disk Unassigned and copy its files to your new data disk.

 

Don't you see the SMART warnings for that disk on the Dashboard page? Do you have Notifications setup to alert you immediately by email or other agent as soon as a problem is detected?

 

 

[Chewwwy_]

I have seen it before, I was under the impression/told that it was not a serious issue.  Obviously I was ill informed.

 

I have reread the understanding SMARTS Report but am still not sure whats wrong with it. Is there a better resource I should read? 

 

Thank you all for your help I really appreciate it

I have ordered another 2 x 8TB drives. I will set up a parity and a replace the drive!

Edited January 6, 2022 by Chewwwy_

[Chewwwy_]

Okay Scrap that, I just read the report when looking at the Smart Report under the Disks Settings. That makes a lot more sense.. I was downloading the smart report and reading it.