Cool. Yeah, as a professional I am constantly aware of data integrity and have most of my shit stored on redundant drives. I had a WoW Guild Officer who shared his home setup with like 8x12TB drives in Windows Storage Spaces with no redundancy that was like 80% full. I had to ask how he slept at night knowing he could lose 80TB of data at any time.

Personally my TrueNAS has 5x1.92TB SSDs setup in two mirror vdevs and a hot spare for my ISCSI LUNs and 8x1.2TB 10K drives in a raidz2 (2 disk parity) for my NAS storage.

I believe ZFS works best when having direct access to the disks, so having a md underlying it is not best practice. Not sure how well ZFS handles external disks, but that is something to consider. As for the drive sizes and redundancy, each type should have its own vdev. So you should be looking at a vdev of the 2x6TB in mirror and a vdev of the 2x12TB in mirror for maximum redundancy against drive failure, totaling 18TB usable in your pool. Later on if you need to add more space you can create new vdevs and add them to the pool.

If you’re not worried about redundancy, then you could bypass ZFS and just setup a RAID-0 through mdadm or add the disks to a LVM VG to use all the capacity, but remember that you might lose the whole volume if a disk dies. Keep in mind that this would include accidentally unplugging an external disk.

Could be trying to mount it loopback instead of by ip. What does your exports file look like? Can you do a mount from 192.168.0.55 manually?

https://discourse.pi-hole.net/t/pihole-blocking-dns-queries-to-letsencrypt-unable-to-obtain-certs-behind-pihole/47423/4

I would start by testing if you can resolve acme-v02.api.letsencrypt.org from the PiHole and if not, see what you need to unblock that.

Probably not but if you want to test it create a directory with some fake files then add and remove it from the interface.

Edit: if you have any movies mapped to /downloads you should probably move them first.

Based on your update you may need to bring the containers down and up to fix the database.

Sometimes when opening LinguaCafe the first time there is an error message about users database table. If this happens, just stop and start your containers again, it should fix the problem.

docker compose down
docker compose up -d

Since you’ve probably been using the SMB protocol to access the NAS you probably need to understand a few things about the NFS protocol which functions differently. The NFS mount acts like a mapping of the entire system, rather than a specific user. That means that if there are differences in the systems, you may get access errors. For example the default user in Synology has a uid of 1024, but most client systems have a default of 1000. This means your user may not have access to the share or files, even if you have it mounted on the client.

One thing to check is what your Shared Folder’s NFS permissions squash is set to. This is found in Control Panel > Shared Folder the the NFS permissions tab. If it’s set to “no mapping” then uids must match. The easiest setup is to “map all users to admin” but you may encounter issues with that later if you switch back to SMB since new files will be owned by admin.

Sounds about right, just be aware that your LAN and WAN networks need to be different, so you’ll likely need to change your old router’s dhcp subnet. E.g. 192.168.1.1/24 on the WAN and 192.168.0.1/24 on the LAN.