Can I backup a Linux install with FW target disk + dmg as well?

[randomshinichi]

I imagine there might be booting issues - or do I just have to bless a specific folder? But OS X cannot read ext4, so it cannot bless a folder - maybe it blesses a partition then?

If I restore to a different disk, how would I tell GRUB2 to find anything / update grub.cfg?

I have no idea where to look for such info. Gentoo Wiki is good but they use yaboot, not grub. I currently plan to install Void PPC.

 

[Strategia]

I would just use dd on Linux to copy the drive over. It also exists on OS X, but as you said it cannot read ext4 partitions. If your install is located on /dev/sda1 and your backup partition is on /dev/sdb1, the command would look something like sudo dd if=/dev/sda1 of=/dev/sdb1 status=progress. You would probably have to run fsck afterwards on the backup drive, as well as creating a new UUID for the drive in your fstab and the Grub configuration files.