ZFS: Use mirror vdevs, not RAIDZ

Re:ZFS: Use mirror vdevs, not RAIDZ by hedora on Wednesday December 09, 2020 @11:08AM (#25360096)

I backup my raid array to the cloud using hyperbackup, but any incremental backup solution would work. It’s ~$60/TB/year:

https://www.backblaze.com/b2/cloud-storage-pricing.html

I only have a few TB, but the setup cost almost $1000 (it is less than half full), and it will take longer than I expect the hardware to last to spend $1000 on backups.

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Re:ZFS: Use mirror vdevs, not RAIDZ by KingMachiavelli on Wednesday December 09, 2020 @01:31PM (#25362009)

If you only need backups in case of whole drive failure, AWS S3 glacier is cheaper at $0.004/GB/month.

But it's still $4/month/TB or $48/TB-Year. Assuming a two 10TB drives are $300 each (actually can get them for less than $200) and last 5 years or warranty expires. ($300*2 drives /5 years / 10 TB = $12/TB-Year). So AWS glacier is still ~4x the cost of buying physical drives with RAID 1 and keeping them at a friends house.

Honestly if there is any cloud storage that trades resiliency for price that would be awesome. As long as the cloud storage can tell me if any of the storage has been corrupted/lost, I'd except a 10% yearly failure rate. If my home raid is 95% and the cloud is 90% then I have an effective yearly data loss of only 0.5%.

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Re:ZFS: Use mirror vdevs, not RAIDZ by res0nat0r on Wednesday December 09, 2020 @01:50PM (#25362493)

Deep Archive is my fav backup solution to just store a lot of data cheaply as there isn't really anything better, just the AWS egress charge is really the only thing they are keeping at a high price and for sure is for lock-in. .09c/GB is still too high to restore TB's of data if you need a full NAS rebuild and need to re-download everything.

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