We previously reported on the rumored Seagate/eVault “cold storage” tech initiative seeking to use disks to supplant tape libraries.

Now come this analysis from The Register.

We know Facebook’s Open Compute Project has a cold storage vault configuration using shingled magnetic recording drives. Both Google (mail backup and more) and Amazon (Glacier) have tape vaults in their storage estate. Shingled drives could change that equation because, probably, the cost/GB of a 6TB shingled drive is a lot less that that of a 4TB drive and, over, say, 500,000 drives, that saving turns into a big sum of dollars.

What are shingled drives, you ask? This video from Seagate explains: