When changing a BTR structure (a simple field-length increase) the
commit failed because one of the affected files was in a read-only
state. Unfortunately however it had already applied the change to the
DDFs.

This meant a tape restore of both the original file and the DDFs,
(luckily Arcserve was playing to the rules that day). Couldn't the
restructure process roll back the DDF changes if it cannot complete
the restructure?

Failing that, could the restructure snapshot the DDFs before it
changes them?

Dave