[Info-vax] Odd BACKUP error: unsupported file structure !

[JF Mezei]

An update:

I booted minimum, and backup/image was just as slow.

However, removing /image made backup much faster (about 130KB/s listed
in a <ctrl-T> compared to between 45 and 50 with /image.

I suspect my large indexf.sys is too much for backup to handle.

So, what am I missing when not doing /image ?

I take it that during a restore, the disk will not be initialised, and
boot blocks not set. (and alias processing would be different but this
disk  doesn't have any). Anything else that will be missing from a
backup without /image ?