Large file copy issue

Dear All,

Not sure if this issue has been noticed elsewhere, so apologize if I’m reporting unnecessarily.

But, if I’m trying to use ddrescue by itself to perform a large file copy, I get io errors.

However, this issue goes away if I pipe the log output to pv, as follows:

ddrescue src_file dst_file | pv

Perhaps there is a sync issue somewhere with copy operations and pipes?

I have seen this issue with 18.04, 20.04 and 20.10, so the issue seems to exist for these three editions of Ubuntu.

Also, I do not get this issue when I am copying large files using MacOS or Windows 10. Just Ubuntu. Thanks.

Jeffrey Wong

This site isn’t designed for technical support. The Finding Help topic details where you can get support for Ubuntu.