Data Hoarder

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We are digital librarians. Among us are represented the various reasons to keep data -- legal requirements, competitive requirements, uncertainty of permanence of cloud services, distaste for transmitting your data externally (e.g. government or corporate espionage), cultural and familial archivists, internet collapse preppers, and people who do it themselves so they're sure it's done right. Everyone has their reasons for curating the data they have decided to keep (either forever or For A Damn Long Time (tm) ). Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures.

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Is a 20 disk raidz3 really a bad idea, for media archiving use cases? (alien.top)

submitted 1 year ago by goldcakes@alien.top to c/datahoarder@selfhosted.forum

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I am archiving a vast amount of media files that are rarely accessed. I'm writing large sequential files, at peaks of about 100MB/s.

I want to maximise storage space primarily; I have 20x 18TB HDDs.

I've been told that large (e.g. 20 disk) vdevs are bad because resilvers will take a very long time, which creates higher risk of pool failure. How bad of an idea is this?

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[–] kwarner04@alien.top 1 points 1 year ago

Mergerfs + snapraid

If a drive fails, you only need the parity disk to restore, not the whole array. Also, if for some reason you can’t restore, you only lose data on the failed drive.

ZFS is great and for real NAS data, I’m a fan. But for large media files and and such that you are write once, read many, it’s a much better option I think.

Mergerfs is just to present all 20 drives as a single mount point so you aren’t searching thru 20 drives when you want to view.