Hello,

Due to hardware issues i replaced my unraid board, cpu, ram.

The array disks stayed the same.

Only after assembling the new hardware i realized that my old single cache SSD was a m.2 SATA drive. The new board does not support m.2 SATA.

I had a spare nvme drive and prepared it by copying all data from the old m.2 sata to the m.2 nvme using rsync. i did this on a different pc which could read both.

Now when i try to select the nvme drive in unraid the gui says "All existing data on this device will be OVERWRITTEN when array is Started".

Is it possible to include the prepared nvme drive into my cache pool and replace the old one without the data being erased at array start?

edit:

Unraid is 7.3.2

the FS is btrfs

Edited July 16Jul 16 by Stef79

19 minutes ago, Stef79 said:

Now when i try to select the nvme drive in unraid the gui says "All existing data on this device will be OVERWRITTEN when array is Started".

Sounds like you're assigning it at the wrong place since that would only show for a drive that's in the array, not in a pool.

1 minute ago, Kilrah said:

Sounds like you're assigning it at the wrong place since that would only show for a drive that's in the array, not in a pool.

it is definitely the cache pool

rsync won't give a clone.

You may have to New Config to get the new drive accepted with its contents.

You can't just change the drive assigned to the pool, click on the pool name, delete it entirely, then create it again with the new disk.

If once that's done and the array is started it asks to format then come back.

Click the pool name, click remove pool (not erase)

Then create a new pool using the same old name.

Assign the disk and start the array

4 hours ago, MowMdown said:

Click the pool name, click remove pool (not erase)

Then create a new pool using the same old name.

Assign the disk and start the array

This worked like a charm. Thanks!