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Absolute OpenBSD, 2nd Edition by Michael W. Lucas

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Running Diskless

If you manage many computers, you probably understand that moving parts cause trouble. Spinning hard drives, in particular, are just a very bad idea.

Try this: If you have a roomful of identical machines, try simplifying maintenance by running them without hard drives. Each machine in this group will use a root directory and filesystem mounted via NFS rather than stored locally. You’ll still need data storage, but you can use a central high-availability disk array, flash drives, or some other mechanism with better reliability than lowest-common-denominator hard drives.

You can extend the diskless installation process to run OpenBSD in full multiuser mode without a local hard drive. Your server will need three additional services ...

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