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I personally think of a small DIY rack stuffed with commodity HDDs off Ebay with an LVM spanned across a bunch of RAID1s. I don't want any complex architectural solutions since my homelab's scale always equals 1. To my current understanding this has little to no obvious drawbacks. What do you think?
You need to ask yourself what properties you want in your storage, then you can judge which solution fits. For me it is:
The amount of data I'm handling fits on larger harddrives (so I don't need pools), but I don't want to waste storage space. And my homeserver is not my learn and break stuff environment anymore, but rather just needs to work.
I went with btrfs raid 1, every service is in its own subvolume. The containers are precisely referenced by their digest-hashes, which gets snapshotted together with all persistent data. So every snapshot holds exactly the amount of data that is required to do a seamless rollback. Snapper maintains a timeline of snapshots for every service. Updating is semi-automated where it does snapshot -> update digest hash from container tags -> pull new images -> restart service. Nightly offsite backups happen with btrbk, which mirrors snapshots in an incremental fashion on another offsite server with btrfs.