Pavel Roskin wrote:
I hope you know that dd creates an empty file when it's asked to copy
zero bytes, and least on GNU/Linux.
dd if=/dev/zero of=foo bs=1M count=0 seek=1
In fact, unless 'conv=notrunc' is given, 'dd' truncates foo to zero
bytes (or the size specified with 'seek'). And you do not want ddrescue
to trucate outfile, right?
Your suggestion would also extend outfile when a position is given
beyond the end of infile, what is not desired either.
I don't see anything wrong with "Nothing to do", even without "Empty
domain". Except that both imply that copying data is the main purpose
of ddrescue and extending the file is a minor preparation job that can
be omitted if not needed. If "ddrescue" was written with that
mentality and nobody except me sees that as an unpleasant surprise, I
guess I should just accept it and use dd for extending files without
copying.
Right. Ddrescue is designed to copy data as safely as possible in the
worst conditions, and in particular to only extend or write to the
output file when there is something useful to copy. I guess dd is the
right tool for extending files without copying.
Best regards,
Antonio.
_______________________________________________
Bug-ddrescue mailing list
[email protected]
https://lists.gnu.org/mailman/listinfo/bug-ddrescue
