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How to image a Debian system on a zfs mirror? (discuss.tchncs.de)

submitted 5 months ago* (last edited 5 months ago) by [email protected] to c/[email protected]

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I have set up a refurbished PC as a media PC with storage. The OS, Debian, is on an m.2 nvme disk of 256 GB. I have connected 2x4TB risks in zfs mirror mode to store my media.

Off late, while booting, I've noticed some messages that suggest that the health of nvme disk is not good. Searching the error, i realised that I should not rely on it. I've done a number of tweaks to set up my system the way I like that I want to save by creating an image of the OS drive on a fresh nvme disk of same size that I have.

How do I go about doing it? I could boot using a live USB and create the image on the HDDs but the live USB OS won't recognise my zfs, right? Is using another external disk or another PC my only option here?

Thanks and cheers!

PS: The machine is a HP Elitedesk 800 G3 that has a wifi port that I've heard can be used as additional port for m.2 drives. Is it true?

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[–] [email protected] 3 points 5 months ago

Phew! I almost believed I was asking for something beyond the scope of linux-fu. English not being my first language may be part of the reason but still I think I covered everything that was relevant.

Yes, that's exactly what I want and your post has given me the clarity I needed. M.2 wifi slots don't support disks so that option is definitely out. I'm going to boot with the latest Ubuntu live OS on a USB and attempt what you've outlined.

I don't have anything really critical on the zfs that is not backed up separately so I'm definitely going to attempt this and learn in the process.

Thank you for taking the time to respond!