Currently, I have a 2x 120G cache pool.

 

I am planning to add a 3rd, but larger, SSD to my cache drives.

 

I'm expecting unRaid to just add the larger SSD as a separate disk (cache 3). As it won't be in a pool, how will it be treated? As part of the 120G (now larger by the new SSD) pool but with only 120GB protected? Or as a separate (from the 120GB) cache pool with it as the only member? Something else?

 

Thanks in advance.

 

Edited April 12, 20188 yr by shaunsund

It will be part of the pool, it will add 60GB to current pool if using the default raid1 profile.

So, if I add a 500G SSD i'll get only an extra 250G?

 

1 minute ago, shaunsund said:

So, if I add a 500G SSD i'll get only an extra 250G?

No, only an extra 120GB

 

http://carfax.org.uk/btrfs-usage/

Sounds like I'd be better off replacing the current 2x 120G drives with 2x 500GB (or even just one) based on the calculator.

 

I take it there's no way to create 2 separate btrfs pools for the cache? IE the existing 120G pair existing pool and a separate single 500GB pool?

5 minutes ago, shaunsund said:

I take it there's no way to create 2 separate btrfs pools for the cache?

Not currently, though there are plans to add that functionality in the future, you can keep the 2 x 120GB pool and use the 500GB SSD with the Unassigned Devices plugin.

2 minutes ago, johnnie.black said:

Not currently, though there are plans to add that functionality in the future, you can keep the 2 x 120GB pool and use the 500GB SSD with the Unassigned Devices plugin.

+1 to that feature. Any timeline to that feature coming out?

I could make UD work in the meantime.

Thanks

You could set up the same type of cache pool and mount as a UD. Only thing you would not get is inclusion in user shares.

This feature seems to be exactly what I need; two separate cache drives not a cache pool.  It needs to have a share that's included in a user share.

 

I hope this feature comes along soon!

 

Thanks,

craigr

Edited March 13, 20188 yr by craigr