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CACHE failed to mount, what next?

Featured Replies

Hi guys.

 

After a re-boot I have lost my SSD cache. I'm not at home now but something like "failed to mount", I got it when I saw I had no dockers nor vm's.

 

I have found an article about trying to copy the contents of the ssd cache:

 

1 - Is still valid or there is a better approach ?

 

2 - Once the contents are copied, can I try to "BTRFS check --repair" the disk ?

 

3 - If the reapir doesn't go well what's the next step?
        - format the disk?
        - replace the disk?

4 - If I can copy the contents,  is as easy as copy the contents back to the new disk to have my docker and vm's back?

 

5 - Can the disk be read in another pc booted from a linux live usb?

 

Thankyou
Gus


 

 

unraid-media-diagnostics-20220104-0029.zip

Edited by zzgus

  • Community Expert
3 minutes ago, zzgus said:

Is still valid

Yes.

 

3 minutes ago, zzgus said:

can I try to "BTRFS check --repair" the disk ?

Yep, nothing to lose.

 

9 minutes ago, zzgus said:

If the reapir doesn't go well what's the next step?

Re-format.

 

9 minutes ago, zzgus said:

If I can copy the contents,  is as easy as copy the contents back to the new disk to have my docker and vm's back?

Yes, as long as everything is successfully copied.

  • Community Expert

One thing I forgot to mention, if this issue started after an Unraid it should mount normally if you go back to the previous release, and this way easier to backup.

  • 2 weeks later...
  • Author
On 1/4/2022 at 12:27 PM, JorgeB said:

If the reapir doesn't go well what's the next step?

 

Re-format.

 

What's the way to format the cache drive?

 

Thankyou

  • Community Expert

If it's still unmountable you just need to click on format, next to array start/stop button.

  • Author
1 hour ago, JorgeB said:

If it's still unmountable you just need to click on format, next to array start/stop button.

Has worked for 15 days since I last repaired but yesterday another time was marked as "failed to mount".

 

Was thinking of formating the drive and copy the contents back to see waht happens.

 

If the content is copied without any problem must I suppose the content is ok and the problem is the disk ?

 

Thankyou
Gus

  • Community Expert

If it's filesystem corruption it's not usually a device problem.

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