Data Backup
25 Apr 2024
According to the 3-2-1 backup strategy, I need 3 copies of my data, on two different media, with at least one copy off-site. One way is a local NAS, local bluray, and remote cloud backup.
Backblaze is $ 6 / TB / month.
A bluray lasts about 5 years minimum. $40 for 100 pack of 25 GB discs. That’s 40 * 100 * 0.025 / (5 * 12) = $ 1.67 / TB / month.
A 5-bay NAS is about $1150 without drives and about $15 / TB. The median life expectancy is 6 years and 9 months. Failure rate starts increasing at year four. Assuming 20 TB drives and 4 years, $ (1150 + 15 * 20 * 5) / (20 * 5 * 4 * 12) = $ 0.55 TB / month.
type | cost ($ / TB / month) |
---|---|
NAS | 0.55 |
bluray | 1.67 |
cloud | 6 |
100 TB of NAS, 2.5 TB of bluray, 1 TB of cloud is $782.10 a year for a backup.
One could get 3 external hard drives every 4 years for $900. Or maybe make that one 20 TB external hard drive a year for $300 / year. 20 TB is only about 10 million webpage, which takes about 2 days to download on gigabit ethernet. Storage is more expensive than I thought it would be. Google Drive is 2 TB for $10 / month or $ 5 / TB / month. Billed annually, it is $ 4.17 / TB / month.
I think the solution is to live a low data life, but I make my money from data. Data also gives me joy. Marie Kondo my data?
- https://www.truenas.com/truenas-mini/
- https://www.backblaze.com/cloud-storage
- https://www.backblaze.com/blog/the-3-2-1-backup-strategy/
- https://www.backblaze.com/blog/how-long-do-disk-drives-last/
- https://www.reddit.com/r/DataHoarder/comments/16f9vay/is_15_tb_for_a_harddrive_still_a_good_metric_to/
- https://www.canada.ca/en/conservation-institute/services/conservation-preservation-publications/canadian-conservation-institute-notes/longevity-recordable-cds-dvds.html
- https://www.amazon.com/Blu-ray-Printable-Recordable-Cakebox-Spindle/dp/B09QHFFG2N