If I wanted to change the file system on my array, I assume I would have to reformat it to the new filesystem, thereby losing everything, correct? So for example if my current file system is XFS and I wanted to change it to BTRFS.

 

Thanks

 

AM

If I wanted to change the file system on my array, I assume I would have to reformat it to the new filesystem, thereby losing everything, correct? So for example if my current file system is XFS and I wanted to change it to BTRFS.

Yes - changing the file system type wipes existing content, so it first needs to be copied elsewhere beforehand and copied back afterwards if you want it to be kept.

But note that each individual disk's filesystem is independent, so you don't have to do them all at once. Setting the default filesystem will not change the filesystem of any disk already formatted, but changing the filesystem of any specific disk will reformat it.