Transfer OpenBSD from one disk to another

For some reason, I need to switch my main (and only) disk running OpenBSD. As it is a production machine, I want to do it fast and painless.

The system will go from the internal SSD disk to an external USB FlashVoyagerGT stick. Yeah, quite weird, but this is temporary :) Anyway, here are the directions.

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ZFS explained and demoed (briefly)

ZFS may be Yet Another File System. To me, ZFS is Ze File System brought by Sun Solaris. It is remarkable because it comes with numerous interesting features. To name a few: redundancy, checksum, compression, deduplication, snapshots.

This article is a kind of cheat sheet on what is ZFS, how it is organized and how to build a consistent storage area using this particular file system. It is mostly an attempt to clarify and write down what I read about ZFS and how it has to be used to achieve various storage goals.

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