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After Swapping Drive, Previous Drive says Unmountable: Wrong or no file system

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Solved by BillPlott

  • Author
20 minutes ago, trurl said:

Don't do anything with those already assigned ports. That is your array now.

 

I have a single disk USB enclosure that works very well with Unassigned Devices. If you already have a way to connect those with USB that would be worth trying.

Ah - OK, I'll see what I can do an an additional option to attach via USB. I don't currently have any hardware to plugin in a drive via USB. if I do get them to mount, what would be my steps after?

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  • Community Expert
22 minutes ago, BillPlott said:

if I do get them to mount, what would be my steps after?

The disks will have top level folders which correspond to user shares. You can examine their contents and copy any you are missing.

  • Community Expert
20 minutes ago, BillPlott said:

if I do get them to mount

If they are unmountable, maybe repairing their filesystem would give some files you are missing.

  • Author
4 minutes ago, trurl said:

The disks will have top level folders which correspond to user shares. You can examine their contents and copy any you are missing.

OK so it would prevent me from having to re-download files by taking them off the mounted disks and putting onto the array. got it!

  • Author

Disk1 finished rebuilding and is operational again.

 

For Disk2, I was going to reformat it next - I believe you said it wouldn't be able to be rebuilt after that right? so, it will start fresh and I can pull data off my original disk2 once I find a method to mount it (or simply re-download the data I'm missing)

tower-diagnostics-20250331-0939.zip

  • Community Expert
8 minutes ago, BillPlott said:

I believe you said it wouldn't be able to be rebuilt after that right?

Format is a write operation. It writes an empty filesystem to the disk. This is basically the definition of "format" for all OS.

 

Unraid handles all write operations in the array by also updating parity so parity remains in sync. So after format, parity agrees the disk has been formatted. Thus, rebuild could only result in a formatted disk.

  • Author
  • Solution

Problem:

Disk1 - Error with red X

Disk2 - Unmountable/bad filesystem

 

Solution:

Disk1 - Repair filesystem and rebuild

Disk2 - Reformat as repair to filesystem failed.

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