I've created the partition table and now anything is fine. :-) Maybe could be an improvement for the future: since Linux has no problem to work with a drive without partition table, could be useful to have Clonezilla doing the same.
Trying Timeshift it says "selected device doesn't have a linux partition", so I realized what's going on: my backup drives have been formatted with sudo mkfs.ext4 /dev/sdc -L etichetta -O sparse_super,large_file -m 0 -T largefile4 -E lazy_itable_init=0,lazy_journal_init=0 This command does not create the partition table (plus, uses less inodes). This gives me 100GB more than the standard format. However Timeshift and Clonezilla doesn't like the lack of partition table and that's the problem.
I've just tried the 2.5.5-19 but same problem: the OS can see the disk but Clonezilla can't. When I'm in the window "Every 3.0" (the window that shows the visible disks refreshing the list automatically), it really shows "sdc" (HUA72302) but as soon as I use CTRL-C getting back to the window that says "Now need to mount a device as /home/partimag", in such window sdc is not present. I've tried rerun, I've tried with the disk turned on before the live started, I tried turning the disk on only in the...
Disk seen by live but Clonezilla doesn't let me choose it
It would be great having top-bottom charts (org structure). It's the only reason...