Hi all, 
I did a reboot of my server - and when it came back up I noticed that disk 5 is MIA. 
UNRAID shows the drive. And reports Unmountable Unsupported or no file system. 

 

Diagnostics attached. 

Thank you for the help. 
 

theoracle-diagnostics-20241026-1520.zip

Post the output from:

 

blkid /dev/sdp

and

fdisk -l /dev/sdp

 

/dev/sdp: PTTYPE="dos"

 

Disk /dev/sdp: 1.82 TiB, 2000398934016 bytes, 3907029168 sectors
Disk model: WDC WD20EZRX-00D
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x00000000

Device     Boot Start        End    Sectors  Size Id Type
/dev/sdp1          64 3907029167 3907029104  1.8T 83 Linux
 

 

Thank you 

 

Sorry, the first one should have been:

blkid /dev/sdp1

 

that command leads to no response - blank line 

 

Thank you 

 

That means no filesystem signature for that disk, I assume it was also formatted zfs like the other ones?

yes and unraid shows that it is zfs 
and the array shows healthy - when a drive falls off the array how can it show healthy? 

It's not a failed disk problem, at least in the sense that the disk dropped, or has read/write errors, but it could still be a disk firmware issue for example, post the output from

 

zpool import

 

:~# zpool import
   pool: disk34
     id: 11401036432785416006
  state: UNAVAIL
status: One or more devices contains corrupted data.
 action: The pool cannot be imported due to damaged devices or data.
   see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-5E
 config:

        disk34      UNAVAIL  insufficient replicas
          sdc1      UNAVAIL  invalid label

That's from parity, you can ignore, disk5 doesn't show up, confirming the fs signature/label is missing, you can see if parity can correctly emulate the filesystem, it may work, depending on what caused the issue, but not much to lose now.

 

Stop the array, unassign disk5, start the array, and see if the emulated disk5 mounts, keep old disk5 untouched for now.

 

If it doesn't work, you should just reformat the disk and restore from a backup, if there's no backup, you can try a file recovery app, like UFS explorer

Thanks trying that. 

What do you think happened here? a ZFS issue? 

That does bring Disk 5 back - but it looks empty. 
Oh boy
and I have to travel for work so I cant work on this till Friday. 
Arrgh 

 

Edited October 27, 20241 yr by daytona235

Good news is - that drive may have been empty - I just converted all my drives to ZFS a few months ago and moved thingss around. 

15 hours ago, daytona235 said:

that drive may have been empty

If the emulated disk mounted but it was empty, then most likely it was already like that.

 

Difficult to say what caused the issue, could be a disk firmware problem, if it happens again to the same disk in the future, it would be my main suspect.

Thank you for your help Jorge. 

Couple of follow up questions: 
1. Is ZFS the right file system to use today - my server has been evolving for over 20 years and I just went to zfs from reiserfs
2. Are there any maintenance tasks I should be doing because my server is now ZFS? 


 

There's a known write performance issue with zfs when used in the array for now, other than that it's fine.

 

If you run regular parity checks there's nothing else you need to do, if some unexpected sync errors are found, you can scrub the disk to see if there are any issues.

I do run a parity check once a month. 
How does one "scrub" the disk? 

 

Click on the disk then scroll down to the scrub section.

Thank you - what does a scrub do? 

Checks all metadata and data blocks for corruption

Hi finally got around to sorting this - decided I do not need this drive anymore - what is the best way to remove this drive from the array. The array is emulating this drive right now? 

Do you still have data there? If yes, you need to move to other disk(s).

No - I do not have any data. 

Then you can do a new config without that disk and then re-sync parity.

Sorry to bother you - is their a particular set of instructions I can follow? Dont wanna muck up my server