Hello. Zeniff Martineau wrote:
Does ddrescue estimate how sparse an output file will be when using --preallocate?
No, because estimating sparseness is not trivial for files and not possible for drives.
If not, I'd like to suggest it as an option to do so and output the expected output file size. Maybe it can do so without even trying to write an image, like a dry-run?
A dry-run on a failing drive just to estimate the amount of sparseness? Does not sound good.
I'm also curious about how it could be done. I think find(1) utility can look at sparseness of files, but how about the free space on a drive?
AFAIK, reading the whole drive is the only way to know the amount of sparseness of the resulting file.
Regards, Antonio. _______________________________________________ Bug-ddrescue mailing list [email protected] https://lists.gnu.org/mailman/listinfo/bug-ddrescue
