I've had Unraid running for many years now with using a single cache pool of two SSDs of the same size.

I've always noticed that even though Unraid reports the cache pool as healthy, and the second drive as being part of the pool. Only the 1st drive ever appears to receive reads/writes, and in general, only that one drive appears to be in-use?

 

Is this expected, or have I been running it improperly this whole time?

 

Thank you for any help!

3 hours ago, Linkd said:

or have I been running it improperly this whole time?

Most likely is only using one device, Please post the diagnostics to confirm.

That’s fine. Both disks are used as cache devices.

click on the cache link and check the balance status.

Attaching diagnostics to this message.

Clicking into both drives, I only see the "Balance Status" section within the 1st drive (the one that's receiving reads/writes).
However, inspecting the diagnostics config, you can see a cache-pool and in that file it list both drives, so I'm very confused.

 

Thanks again for any help.

unraid-diagnostics-20220526-1040.zip

Diags are incomplete, only the config folder is there, please grab new ones.

             Data      Metadata  System              
Id Path      single    single    single   Unallocated
-- --------- --------- --------- -------- -----------
 1 /dev/sdg1 397.00GiB   2.00GiB 32.00MiB    48.10GiB
-- --------- --------- --------- -------- -----------
   Total     397.00GiB   2.00GiB 32.00MiB    48.10GiB
   Used      364.44GiB 314.58MiB 80.00KiB   

 

They confirm only cache1 is being used, you can usually fix it doing this:

 

-stop the array

-unassign cache2

-start array

-stop array

-re-assign cache2

-start array

 

You should now see activity for cache2, in case of doubt post new diags.