I've upgraded my system from 2 sata ssds to 2 nvme ssds.

When I started up the array I added the 2 nvmes to the same pool as the existing 2 satas. i.e. there are now 4 drives in the pool.

As far as I can tell they are raid 1. Clicking cache says:

 

    Data, RAID1: total=206.00GiB, used=204.18GiB
    System, RAID1: total=32.00MiB, used=48.00KiB
    Metadata, RAID1: total=2.00GiB, used=1.14GiB
    GlobalReserve, single: total=341.97MiB, used=0.00B

    No balance found on '/mnt/cache'

 
     Current usage ratio: 99.1 % --- No Balance required

 

I want to remove the 2 satas.  I thought I could just stop array  and says pool has 2 disks but I can't lower it.  So what's the procedure to simply remove the drives and let it 'rebalance' (I think) to just the 2 nvmes?

 

 

bridge-diagnostics-20231022-1536.zip

Edited October 22, 20232 yr by 128bytes

You can remove one at a time:

https://forums.unraid.net/topic/46802-faq-for-unraid-v6/?do=findComment&comment=480418

 

5 hours ago, JorgeB said:

You can remove one at a time:

https://forums.unraid.net/topic/46802-faq-for-unraid-v6/?do=findComment&comment=480418

 

Thank you they were removed,

However now the NVMes are listed as Cache 3 and Cache 4.  How can I move them up to 0 and 1?

You can move them with the array stopped.

19 minutes ago, JorgeB said:

You can move them with the array stopped.

It doesn't appear so, I get quite a nice red warning All existing data on this device will be OVERWRITTEN when array is Started

bridge-diagnostics-20231023-1030.zip

Edited October 23, 20232 yr by 128bytes

That used to work, but maybe something changed, do this instead:

 

Stop the array, if Docker/VM services are using the cache pool disable them, unassign all cache devices, start array to make Unraid "forget" current cache config, stop array, reassign all cache devices (there can't be an "All existing data on this device will be OVERWRITTEN when array is Started" warning for any cache device), re-enable Docker/VMs if needed, start array.