I just exchanged my 2 TB HDD in my A1419 27" 5K late 2015 iMac to a 2 TB SSD (before that, it was part of a Fusion Drive configuration). Now I went into recovery mode on startup and tried restoring from that backup via network. The drive appeared as it should, and the backup, too, but every time I try to access it, it fails with error 112. I then tried to access the backups from another Mac in the network, and Time Machine nicely shows me all the backups and I can open up the last one and see all folders and files. So what's the problem here?
I'm using a Synology NAS and usually connect it with SMB.
For restore your Save Big Sur, you need a disk or Fusion Dive with APFS format.
In Internet Recovery Mode with no system installed on the internal disk, the system offert is the initial system of your Mac.
So you can't create a container with APFS format with a system older than High Sierra.
diskutil list internal?
diskutil list("internal" would just give me an error?).