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Unmountable:Wrong or no file system

Featured Replies

Hello, I'm having a problem with one of my drives (Disc1) that is saying Unmountable:Wrong or no file system and I could use some advice on what to do 

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  • Community Expert

Attach Diagnostics to your NEXT post in this thread.

 

Also, please try to give us screenshots instead of photos.

  • Community Expert

Your diagnostics suggest you are running a correcting parity check. That is not a good idea while you have an unmountable disk, since that will make parity in sync with that unmountable disk. And it couldn't possibly help your problem anyway.

  • Author

should I fix it?

Screenshot 2025-03-09 072717.png

  • Author

what should I do now?

Screenshot 2025-03-09 073333.png

  • Community Expert

Start array in normal (not Maintenance) mode and post new diagnostics

  • Community Expert

Go to User Shares page, click Compute... for your new lost+found user share, and post the result.

  • Author

how do I find the results?

Screenshot 2025-03-09 080613.png

  • Author

looks like everything is there

 

  • Community Expert
17 minutes ago, trurl said:

click Compute... for your new lost+found user share, and post the result.

The result would be on the User Share page after it has finished doing the calculation for that lost+found share.

 

5 minutes ago, Yusuf said:

looks like everything is there

 

Not sure what you mean by that, diagnostics shows some user shares besides lost+found are on disk1, so everything isn't lost+found.

  • Author

is this it?

7021687251

  • Community Expert

Let's try it this way. What do you get from command line with this?

du -h -d 1 /mnt/disk1/lost+found

 

  • Author

Screenshot 2025-03-10 071251.png

  • Community Expert

Not much lost+found so looks like repair turned out pretty good.

  • Author

Sweet! I appreciate the help brother 

  • Community Expert
19 hours ago, trurl said:

Not much lost+found so looks like repair turned out pretty good.

You might examine its contents to see if anything looks important. Repair often loses the names of files and folders it puts in lost+found.

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