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Cake day: July 1st, 2023

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    1. RAID for uptime, backups for data you care about. RAID(1+) will keep your data online when a disk fails, but backups are the real way to keep data around if shit hits the fan. For a personal media collection, you might be better served with a non resilient RAID0 (total failure if one drive fails) with a backup around to recover from when that happens. If you do e.g. a raid5 you lose 1 disk of capacity in exchange for 1 disk of resiliency, raid6 same but 2 disks. That gives you some safety but there are a lot of instances where those raids don’t save you from losing all your data. If you buy 4x 18TB drives, you could have 36TB from the 1st two drives and then backup to the other two drives.

    2. There’s no specific type of drive to worry about unless you’re doing RAIDs especially with ZFS. Search shingle RAID rebuild for the biggest thing to worry about there.

    3. Almost always, yes. Slow drives throttle the rest.

    4. I’ve never used them but people say good things about synology most of the time. Everything comes with a cost and it’s hard to make any sensible recommendations without knowing your constraints; primarily your budget.