Hello all.  New user.  Created my first array and I'm confused about the space.  I found posts about a new empty array using 20GB from the start.  That's fine, I see that in the shares list for the system share.

 

 

But I don't understand why "USED" is 78GB.  The posts I have seen for a new system with no data shows the 20GB.   But why is my used space so much higher and doesn't equal the amount shown in the shares tab?

 

Thanks,

Greg

 

That XFS overhead and normal, the larger the disk the more it will use.

The moment you format a drive you will see about 1% of the available space used to hold the directory structures for an empty file system.

That doesn't make sense since I've seen other posts that have 8TB disks in array (16TB array) and only 20GB used.  Those posts also say that the overhead is not used as part of the USED calculation.  This is just one example.  At the same time, there are other posts that rubber stamp the "overhead" answer.

 

 

 

18 hours ago, ggee said:

That doesn't make sense since I've seen other posts that have 8TB disks in array (16TB array) and only 20GB used.

That was before, it changed a few years ago:

 

 

Thanks for the update.