Hi folks!

 

I'm having a "Cache disk is high on usage (71%)".

 

My cache is a pool of two KINGSTON SA400S37 120G and my question is:

 

How is the process of upgrade the cache disks?

 

Questions:

 

1. Can I remove one of 120G and add a 240G?
2. Can I remove both at the same time and add a 240G?
3. What is the best strategy to do so?

 

Thanks in advance!

 

Eduardo

13 minutes ago, EDalcin said:

Can I remove one of 120G and add a 240G?

You can upgrade one at a time.

 

13 minutes ago, EDalcin said:

Can I remove both at the same time and add a 240G?

No.

 

13 minutes ago, EDalcin said:

What is the best strategy to do so?

 

See here for more info, if you're still on v6.9.x update to v6.10 first since it's broken on that release:

https://forums.unraid.net/topic/46802-faq-for-unraid-v6/?do=findComment&comment=480419

 

 

Thanks Jorge. I'm version 6.10.1

 

Thus, based on this:

 

Quote

-You can directly replace/upgrade a single btrfs cache device but the cache needs to be defined as a pool, you can still have a single-device "pool" if the number of defined cache slots >= 2

 

That means I can shut down, take one of the 2 SSDs out of the cache and put a bigger one and turn it back on, and it will rebuild the new one from the remaining old one. Right?

You won't get increased capacity until both are replaced, one at a time, following the linked procedure.

23 minutes ago, EDalcin said:

Right?

What you describe is not a direct replacement, the part you quoted is for direct replacing a single device, direct replacement always requires the old device connected, though it should still work, but not something I tested much, if you can't have both new and old devices connected I would suggest first removing one device, shutdown and a connect the new device, then add the new device to the pool.

Yes, I can't have a bigger new one *AND* the old two together. No more ports available...

 

I'll try the "removing one device" procedure. 

 

Thanks!