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Cache Drives showing as "Unmountable: not mounted"

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I'm in the process of setting up an unRAID server and I'm having an issue with 2 of my drives. I have the drives setup in two different pools, both pools are setup with 1 device in each pool and I've set the filesystem to xfs. 1 drive is small NVMe drive and the other is a SATA drive. Both are M.2 drives. These aren't new drives, they were previously in the server and being used to run Proxmox. As far as I know these drives were working before I installed unRAID (it's possible I somehow killed both of them during my migration to unRAID but that seems pretty unlikely).

 

I've tried formatting both drives through the UI multiple times and erasing the drives and nothing seems to help. I tried running the xfs_repair on both but that didn't help. The NVMe drive gave the following output:

Quote

Phase 1 - find and verify superblock...

bad primary superblock - bad magic number !!!

attempting to find secondary superblock...

...Sorry, could not find valid secondary superblock

Exiting now.

 

The SATA drive gave the following output

Quote

Phase 1 - find and verify superblock...

bad primary superblock - bad magic number !!!

attempting to find secondary superblock...

....

 I didn't wait for it to finish finding the secondary block, I cancelled it early.

 

I don't even know where to begin with this issue. I'm completely new to unRAID but I've used Linux for a while so I'm comfortable getting down and dirty with the shell if I need to.

 

Any help getting this fixed would be really appreciated, I really want to get unRAID going on my server.

  • Author

Sorry, should have read the read me first...

 

unRAID Version: 6.9.2 2021-04-07

Hardware:

  • Mobo: ASUSTeK COMPUTER INC. PRIME X470-PRO
  • CPU: AMD Ryzen 5 2600
  • RAM: 48Gb
  • HBA: LSI 9211 8i (flashed to IT mode)

A note in the diagnostics, one of the HDDs has a bunch of errors, I'm not using it in my array I just haven't had a chance to figure out which drive it is to disconnect it.

clow-diagnostics-20220324-1102.zip

  • Community Expert

Try wiping the devices first with:

 

blkdiscard -f /dev/sdX 
blkdiscard -f /dev/nvmeXn1

 

Not sure if -f is needed with v6.9, if it doesn't work just remove that.

 

  • Author

I tried running blkdiscard on both drives and it didn't seem to help. I wasn't sure the order to do it in though. I tried running the commands then restarting the array. I also tried running the commands when the array was stopped then starting it up and the only difference that made was I now get:

Quote

Unmountable: Unsupported partition layout

 

I tried formatting after that and that puts me back into my original problem state.

  • Author

I managed to get both drives working by doing a pre-clear on both of them. Is a pre-clear always required?

  • Community Expert
6 hours ago, amura11 said:

Is a pre-clear always required?

No, some devices come with weird partitions, but blkdiscard should fix that, same as preclear, but without actually adding a write cycle.

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