You can just drop in a new boot drive and install from a usb. I do recommend setting up a boot pool mirror though. This way if one goes down, you have a spare that can be used to help recover more quickly.
this post was submitted on 23 Dec 2024
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Yeah, if it's ONLY a separate boot drive, the spanned volumes should still be in tact.
Your data is safe. Worst case is that you need to do some reconfiguration of the system after you reinstalled it. You can import your existing data drives.
Have you got a recent copy of the configuration file?
Export the configuration is step one. Step two is to replace the drive. You probably don't need to reinstall but having the exported config will make it easier if you do.
I don't think that's possible if they don't have a working boot drive.
Oh I misread. They would need to do a ZFS only mount from a different device and then manually replace it.