@florent , I tried the option of running "vhd-cli raw alias.vhd /dev/null".
I was reading that vhd-cli raw copies the entire VM disk from the backup to /dev/null, reading the incremental backup file and the parent backup.
But something seems off here.
The VM disk in the backup has 133GB of block files within /data. And when I ran the tool, it took 7 seconds. The backup is on a USB hard drive (HDD), so I suspect the read speeds aren't higher than 30-60MB/s.
Just reading all the blocks should take at least 40 minutes.
Did I misunderstand how vhd-cli raw works?
Tank you for your attention.