HI hope this is the right area to post this. (unraid newbie here!) I recently added x2 240gb ssd to be used for cache (1 for backup) I've installed them ok and they show up however the 2nd cache drive (I've called cache_backup) has nothing on it. It doesn't seem to be backing anything what's on the main cache drive. I've changed my app data shares etc.  to use cache but no luck! do u have any ideas?  

 

Thanks in advance

You have created a separate pool named cache_backup instead of adding a 2nd drive to your cache pool. 

Attach Diagnostics to your NEXT post in this thread 

Hi no sorry the 2nd drive is called cache_backup. how do i attach diagnostics?

im also getting No balance found on '/mnt/cache_backup'

infinite-diagnostics-20230407-1714.zip

2 hours ago, hal5400 said:

im also getting No balance found on '/mnt/cache_backup'

That is normal, was your intention to have two separate pools?

 

 

It was my impression that having a 2nd ssd cache drive should backup the 1st ssd cache drive but that doesn’t appear to be happening as the 2nd cache backup drive is empty and I can’t figure out why.

Because you made a new separate pool with the 2nd drive instead of adding the 2nd drive to the same pool as the first.

You can have a mirrored pool, but for for that both members need to be assigned to the same pool, also please note that it's not a backup, it just adds redundancy in case of a device failure.

10 hours ago, Kilrah said:

Because you made a new separate pool with the 2nd drive instead of adding the 2nd drive to the same pool as the first.

I wasn’t aware that I added a second pool I just stuck the drive in and named it cache_backup. I thought unraid was supposed to just do it’s thing and naturally create a raid 1 environment from that 2nd ssd drive. So how do I fix it ?

Unassign the cache_backup SSD, start array, stop array, change slots to 2 for cache, assign the SSD to cache2, start array.