Disk UUID has changed

[RT87]

Hi,

 

I changed my pool drive from an internal SATA conncetion to an external (SATA case plugged in as regular USB; I know it's not exactly "recommended" to do so). Now it doesn't recognize the disk since apparently the UUID has changed (I assume the SATA case transmits the ID of the controller chip or similar).

 

Can I explicitly tell UNRAID to recognize this drive as the one that has been in that exact position? I.e. by manually changing the UUID mapping?

 

Alternatively, how can I resolve this situation without compromising my pool?

 

Best and thanks

Richard

[JorgeB]

Is this a single drive pool?

[RT87]

the pool is basically only this drive (no second drive, neither parity nor regular), if that is what you mean

[JorgeB]

There's no parity drive for pools, assuming you still mean a pool and not the array you can fix that by unassigning the pool device, start array, stop array, re-assign the device, start array.

 

Note that some USB bridges are not transparent, i.e., it won't detect the old partition, if that happens don't format.

[RT87]

sry, Ich meant "cache pool" (which to my knowledge have parties or at least redundancy, although I haven't used that so far)

 

Does your answer still apply? Because I can start the array, even though the next to the cache disk it says "Wrong", but I am unsure of what will be the result...

Edited November 27, 2022 by RT87

[JorgeB]

15 hours ago, RT87 said:

Does your answer still apply?

Yes, and cache pools can be redundant, but there's no dedicated parity, so just wanted to make sure you didn't mean the array.

[RT87]

nope, not the regular array :)!

Thanks for your help, I'll try!

[RT87]

okay, so.... I cannot start the array without the disk, i.e. "Missing", and when I start it using the correct disk (although not recognized), it says "Unmountable: No pool uuid".

[JorgeB]

24 minutes ago, RT87 said:

I cannot start the array without the disk, i.e. "Missing",

You need to check "I want to do this" or similar next to array start button.

[RT87]

ok, that at least worked worked in starting the array with the disk, but now it indeed says "unmountable: wrong or no filesystem"

[JorgeB]

22 hours ago, JorgeB said:

Note that some USB bridges are not transparent, i.e., it won't detect the old partition,

If it doesn't work with the USB bridge don't use it, or use a different one.

[RT87]

That's the only option? (sry!)

[JorgeB]

That or reformat the pool, of course all there would be deleted.

[RT87]

If I have another drive which could serve as cache (which incidentally I do), I assume I could just copy the data and use that drive (after proper init), correct?

[JorgeB]

Yes.

[RT87]

okay, thank you very much, I will try switching the disks, I think in my particular case that is probably the better method.

[RT87]

btw: that worked flawlessly