On Oct 8 11:36, Andrew Medico wrote: > Lines: 42 > > I'm running into a problem with dd's "iflag=direct" option in Cygwin. > When I combine it it with "conv=sync,noerror", dd successfully reads > all of the data from the device but once it gets to the end of the > device it starts reporting I/O errors and never terminates: > > $ dd if=/dev/sdd of=/dev/null conv=sync,noerror iflag=direct > dd: reading `/dev/sdd': Input/Output error > 1952767+0 records in > 1952767+0 records out > 999816704 bytes (1.0 GB) copied, 1678.11 s, 596 kB/s
I fixed that in CVS for Cygwin 1.7. Apparently when reading over the end of a drive (but not a partition), Windows decides to return a weird error code ERROR_CRC instead of just returning EOF. For Cygwin 1.5.25, the workaround is not using iflag=direct but standard buffered reading. It's much faster most of the time anyway. Thanks for the report, Corinna -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
