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io errors and disappearing directories

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Hi, see my attached diagnostics.  The symptoms that i see are that when i start my download at night - to this server, i wake up in the morning and directories are not able to be created, downloads have failed to the server.  This has happened the last 2 nights only.  I rebooted the server and updated to 6.2.1 yesterday, today i will do the same with update to 6.2.2.

 

Unfortunately i do not have physical access to the server for a week. i get no errors from unraid itself, just the problems i am seeing.

 

What should i do?

pipe-diagnostics-20161022-0832.zip

  • Community Expert

 

 

Run xfs repair?  PS thanks for reply.

 

Yep, follow the wiki instructions.

 

  • Author

Ok, i ran - xfs_repair -nv /dev/sdd

and it said bad superblock bad magic number attempting to find a secondary superblock.

 

Looks like it will be  a while for the test (assuming a test first is smart)  Also its been a long time since i checked parity.

 

Also if you don't mind, what was the trigger in the logs to see disk 3 was the problem?

Ok, i ran - xfs_repair -nv /dev/sdd

How did you determine that command line? Apparently the wiki needs to be clarified, if that's where you got the info.
  • Author

Ok, i ran - xfs_repair -nv /dev/sdd

How did you determine that command line? Apparently the wiki needs to be clarified, if that's where you got the info.

 

I looked at main tab, to see the sdd for disk 3, then clicked on the more info about xfs repair here - https://lime-technology.com/wiki/index.php/Check_Disk_Filesystems#xfs_repair

 

the command is on the bottom on the examples.  -

 

Should i be just running it without the n instead? - xfs_repair -v /dev/sdd

 

 

  • Community Expert

Ok, i ran - xfs_repair -nv /dev/sdd

How did you determine that command line? Apparently the wiki needs to be clarified, if that's where you got the info.

 

I looked at main tab, to see the sdd for disk 3, then clicked on the more info about xfs repair here - https://lime-technology.com/wiki/index.php/Check_Disk_Filesystems#xfs_repair

 

the command is on the bottom on the examples.  -

 

Should i be just running it without the n instead? - xfs_repair -v /dev/sdd

that will not work.  If you are working with the physical device then you need to also include the partition number (e.g. /dev/sdd1) .  However doing so will invalidate any parity you have.

 

The process recommended in the link you quoted is to start the array in Maintenance mode, and then run the repair against the /dev/mdX type devices (where X corresponds to the disk number in the unRAID GUI).  This approach maintains parity.  It can also be run against an 'emulated' device.

Ok, i ran - xfs_repair -nv /dev/sdd

How did you determine that command line? Apparently the wiki needs to be clarified, if that's where you got the info.

 

I looked at main tab, to see the sdd for disk 3, then clicked on the more info about xfs repair here - https://lime-technology.com/wiki/index.php/Check_Disk_Filesystems#xfs_repair

 

the command is on the bottom on the examples.  -

 

Should i be just running it without the n instead? - xfs_repair -v /dev/sdd

Couple of notes here:

 

#1 The wiki states to use the partition # within the command

 

xfs_repair -nv /dev/sdc1 -> tests and reports without making changes

 

#2 Any repairs against the raw disk (in this case sdd) will invalidate parity until the next correcting parity check is run.  To keep parity in sync, you need to use the disk references  (ie: on a quick glance your repairing disk3, so you would use /dev/md3 instead.

  • Author

Thanks, yes i clicked on the link for more info at top

Note: for more info on the xfs_repair tool and its options, see xfs_repair.

 

and thanks for clarifying that. i had started a repair with the sdd, but i don't think it did anything, it was still looking for a super block.  I have started the proper command now and it is on phase 6.

 

my knowledge of linux is not too good yet, so i went with what i new, sdd.  I guess i am pretty good at newb testing faqs.  Scary.

 

 

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