I came back from Holliday and I just changed the case of the pc that runs the truenas server.
the pool is still active with right drives. but all of my data is gone.
I tried rebooting it, changing the sata cables.
there are very important pictures on it from my sons first birthday etc …
Welcome to the Forums and sorry for your apparent loss of data, however your posting is very incomplete for anyone to help you out of this mess. I think when you read it back, you will understand. It is quite possible this is an easy fix.
Please read at least the first two paragraphs of ‘Joes Rules’ in my tagline link below. Post the requested information for the Data section. We need to know the zpool commands and please post using the </> icon above in the edit window to retain the proper format of the text as this is actually critical.
Once we have that information, we can help you.
Edit: How are you accessing the data? SMB Share? have you verified the SMB share is working properly? It is odd that your data would just be gone, so explain what you are seeing as well.
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I know how that feels…
Pls post the output of:
sudo zpool status -v as described by @joeschmuck