Need advice on ideal drive setup (media + docker apps + backup + Linux ISO seeding)

Hi Unraid community,

I'm building my first server and need guidance on the optimal drive configuration. I want to make sure I'm setting this up correctly from the start.

My Setup (in progress):

• Fractal Node 804 case

• Intel Core Ultra 225

• 32 GB DDR5 RAM

• 2x Toshiba MG09 18 TB

Use Cases, for 3 users :

1. Media (Films/TV) 

2. Linux ISO seeding – I plan to seed Linux distributions on private trackers for weeks/months

3. Docker applications – Plex, qBittorrent (with ProtonVPN), Sonarr/Radarr/Lidarr, n8n, Bitwarden, Recipya, maybe an LLM in the future...

4. Personal backups – photos, raw/edited videos for YouTube/Instagram (critical data)

Questions on Drive Setup:

Still wondering which HDD / SSD should I buy to start and expand later (hence the post).

BUT I'm guessing:

• those 2 18TB drives will be used specifically for linux ISOs.

• I'll need 1 or 2 SSD for Cache and docker data

• And an array of X+1 HDD for Personal backups (including docker data?)

1. Configuration for Cache & Docker Data:

   • Should I use 1 or 2 NVMe drives for cache?

   • Should Docker appdata be on the cache pool or separate?

   • In your experience (I know that it depends on use cases but trying to understand as I'll have only 2 NVMe port and another one repurposed as Sata ports

     • What size(s)? (500 GB, 1 TB, 2 TB?). I have no idea how much space docker containers can take

     • What speed class? (Gen 3, Gen 4). Does it even matter?

2. Linux ISO Seeding Strategy:

   • I want to seed Linux ISOs mid/long-term > I understand I should not seed from an array with parity:

     • What's the community best practice?

     • Does anyone seed ISOs indefinitely on their NAS?

Any advice on the ideal configuration for my needs and seeding workflow?

Thanks!