Hello Zeniff. Zeniff Martineau wrote:
I have the same issue: * ddrescue consistently gets zero errors, yet produces a different image every time. * Have already made 6 images saved to 2 different HDDs with different filesystems. * Imaging an entire 8GB Kingston flash drive (1 image contains 3 partitions) * ddrescue version 1.17 on Arch Linux
I guess you are reading the data through an USB port. Maybe this is the problem. I had to reduce the frequency of my RAM from DDR400 to DDR333 because it trashed all my flash drives connected to the USB port!
I thought it might be a bad flash drive...but, there are no errors in any logs caused by the flash drive (as far as I can tell)...
Ddrescue can't know if the data are really good or if the hardware is lying about it. Does ddrescue produce different images when reading from other devices?
1. If this is a bad flash drive, why is it reading files correctly with no errors, but only the images are bad?
I don't know. Are you sure that the files are always copied correctly?
2. If this is a bug in ddrescue, what can I do to help it get resolved
Providing a reproducible testcase.
3. If there is no workaround for this, is my best bet to just use rsync to copy the files and forget about making an image?
I doubt it.
4. Is there some way to merge the images to create a more correct version, similar to the multiple bad CDs example from the docs? (can't really use the doc example, though, because no ddrescue logs contain errors)
Ddrescue can't merge the images if the hardware does not report the errors. I think the only kind of files that can be merged in such circumstances are lzip-compressed files (using lziprecover).
P.S. Sorry to reply to an older message. It's my 1st mailing list post and this unreplied-to message by matt456 from 2013-03-03 matches my problem exactly and I can't find any other info after searching all day.
Sometimes a message does not obtain any response, specially if nobody has any useful answer.
Regards, Antonio. _______________________________________________ Bug-ddrescue mailing list [email protected] https://lists.gnu.org/mailman/listinfo/bug-ddrescue
