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Fix Common Problems reports appdata should be cache only, why? Seems dangerous?

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  • Community Expert

The "errors found" suggests this link:

 

This does NOT make a lot of sense to me.  My Plex Server uses appdata (hence the name "application data" to store it's information regarding my media), so why would I only want this set to cache only?  If I shut down my Unraid server, then I assume I would lose all my Plex data related to my media files?  This seems like a REALLY bad suggestion to make appdata cache-only.  

 

This "recommended fix" seems more like a work around to an Unraid limitation?  Is this still an issue with Unraid 7.0.1?

 

Rob.

 

EDIT: 

image.png.d7ded215cb840e09a1ae9d353fe3e54b.png

 

I assume by "Cache Only" you mean set "Secondary Storage: None"?

Edited by RobAinscough

  • Community Expert

it has to do with the fact that you have a primary storage and secondary storage set.

docker appdata should only be set to one primary storage....

It should be set to a single primary location...

This is do to how mover moves between the cache to the array in your setup...
new files are created on the cache disk when mover is called and ran it will move the files off cache to the array.

if dockers like database are running this can break files location access and cause data corruption...

 

Review the docs:

https://docs.unraid.net/unraid-os/manual/shares/ 

https://docs.unraid.net/unraid-os/manual/shares/user-shares/ 

https://docs.unraid.net/unraid-os/manual/shares/disk-shares/ 

https://docs.unraid.net/unraid-os/manual/shares/network-access/ 

  • Author
  • Community Expert

So if I understand you correctly, I should set appdata to Array only as primary and no cache?

  • Community Expert
3 hours ago, RobAinscough said:

I should set appdata to Array only as primary and no cache?

Normally the other way around as having appdata on the array limits performance of docker containers.  The same applies to the 'system' share.

 

7 hours ago, RobAinscough said:

If I shut down my Unraid server, then I assume I would lose all my Plex data related to my media files?

No - the files will still be there when you reboot the server.   Not sure why you think that files that are on the 'cache' pool will not survive a reboot.

 

Most users then use the appdata backup plugin to make periodic scheduled backups of the 'appdata' share to another location on the array just in case the pool fails, or have multiple drives in the pool setup to provide redundancy.

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