Don’t use btrfs if you need RAID 5 or 6.

The RAID56 feature provides striping and parity over several devices, same as the traditional RAID5/6. There are some implementation and design deficiencies that make it unreliable for some corner cases and the feature should not be used in production, only for evaluation or testing. The power failure safety for metadata with RAID56 is not 100%.

https://btrfs.readthedocs.io/en/latest/btrfs-man5.html#raid56-status-and-recommended-practices

I don’t think I’ve ever seen a public WiFi network with IPv6 enabled. I usually just use the hotspot on my phone to access my server since my cell carrier provides IPv6. I do have a VPN as a backup though.

I use rsync to transfer files between my VPS and computer. Don’t torrent on Oracle Cloud without a VPN, they will terminate your account.

Did you install the libdvdcss package? It’s needed to crack the encryption and may not be installed by default due to legal issues.

Torrents are more reliable too. Every block gets its checksum verified automatically. If there is any corruption, the block will be downloaded again. With a direct download, you have to verify the checksum yourself and if it’s corrupted, you have to download the entire ISO again.