I have like 7tb of data on my current raid array, and in the future, I plan to wipe it and make it ZFS, with 3 additional 7tb drives. I'd like to not lose all the data. I'm sure I can't be the only one who has this issue. What do you guys use for temporary backup solution, while repurposing your HW.

Realize I have no way to backup 10s of TBs, cry, destroy my ZFS pool and start over. 90% of my stuff is media which I can easily reacquire from Usenet in about 1.5-2 weeks of 24/7 downloading. So, not really a hassle, it just takes forever.

If you have good upload bandwidth (like if you're on fiber and have a 1 gig upload) IDriveE2.com has pretty reasonable pricing, it's object storage (think S3) not block storage (any normal filesystem) though, but if you're just using it for a backup that shouldn't matter. I apparently got in right before they doubled their prices and got 50 TB for a year for $500. They have "on demand pricing" which is more expensive than their yearly plans, but it's currently $4/TB/month so that would only cost you like $30...assuming you can upload all your data to their servers.