Power fail and now I get an xfs segfault and cannot restart (6.2.1) (Resolved)

[local.bin]

Hi there

 

I am in a position now of not being able to startup.

 

The system boots and goes to the command line, when about a second after reaching the command line I get a segfault and although I can get to telnet, the gui does not load.

 

I have tried in safe mode and the same thing occurs.

 

Any help or direction would be much appreciated please.

 

Thanks in advance.

syslog.txt

[JorgeB]

You need to start in maintenance mode and run xfs_repair on disk4.

 

If array is set to autostart disable it by editing disk.cfg on your flash drive (in the config folder):

 

change startArray="yes" to "no"

 

Then:

 

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

[local.bin]

Hi johnnie.black

 

Thanks for the fast reply

 

Can I do that from the command line, as I am only familiar with seeing that mode on the gui, that I cannot reach.

 

Edit: Ok think I understand, in the the array was set to auto start, so hopefully now I can get to the gui to enter maintenance mode.

[local.bin]

 

So I am no getting the following;

root@Tower-64:~# xfs_repair -v /dev/md4

Phase 1 - find and verify superblock...

        - block cache size set to 3055480 entries

Phase 2 - using internal log

        - zero log...

zero_log: head block 1607585 tail block 1602099

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.

 

Am I able to only mount md4?

[JorgeB]

Use -L

[local.bin]

 

Thanks, yes, had just used -L and all seems to be back up agaian. Thanks.

 

If I had lost any data should unraid have gone into a restore mode to restore that data from parity?

 

It hasn't so can I assume all my data is in tact...

[JorgeB]

Parity can be used to restore a failed disk, not a corrupt filesystem, that always need to be fixed using the filesystem repair tools.

[itimpi]

 

Thanks, yes, had just used -L and all seems to be back up agaian. Thanks.

since you had to use the -L option to xfs_repair there is a faint chance metadata applying to the last file or so has been lost.  However in my experience that is rare.

 

If I had lost any data should unraid have gone into a restore mode to restore that data from parity?

No - that is not the way parity works.  You might want to read the user documentation to get a better understanding of how parity works.  When you get file system corruption then this is normally also reflected in the parity disk.

 

It hasn't so can I assume all my data is in tact...

it is always worth checking you do not have a lost+found folder after running a xfs_repair.

[local.bin]

 

Thanks both.

 

I had checked lost+found and it had one file of zero length, so I had assumed I was ok....naively or not!