[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Grub dd?

From: Peter Xu
Subject: Grub dd?
Date: Sun, 21 Nov 2021 11:26:24 +0800
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.3.0

Hi, Grub list,

I found there's no "dd" command for grub.  Is there a reason?

Asked because I think it could be really handy to be able to do that with grub. For example, a simple use case is we can backup root partition somewhere on a backup disk before hand, then if the real root partition corrupted for some reason we can always dd it back within grub loader. It could be helpful when it's non-trivial to attach a USB live image to the system so we can't initiate "dd" in a live Linux distro.

I'm actually thinking of some way to allow the root fs to be recovered from a "snapshot" by dd-ing from a backup block device before loading linux and everything, for every single time the system boots. Then we guarantee every time we boot into the system we'll always see the same content for root fs. Not sure whether that can be easily done with current grub.


Peter Xu

reply via email to

[Prev in Thread] Current Thread [Next in Thread]