FAQ for unRAID v6

This thread is reserved for Frequently Asked Questions, concerning unRAID as a NAS, its setup, operation, management, and troubleshooting. Please do not ask for support here, such requests and anything off-topic will be deleted or moved, probably to the FAQ feedback topic. If you wish to comment on the current FAQ posts, or have suggestions or requests for the FAQ, please put them in the FAQ feedback topic. Thank you! Index to common questions Some are from the wiki FAQ, so

Can I change my btrfs pool to RAID0 or other modes? Yes, for now it can only be manually changed, new config will stick after a reboot, but note that changing the pool using the WebGUI, e.g., adding a device, will return cache pool to default RAID1 mode (note: starting with unRAID v6.3.3 cache pool profile in use will be maintained when a new device is added using the WebGUI, except when another device is added to a single device cache, in that case it will create a raid1 pool), you