dd_rescue

Release Notes: Changes since the last published version (1.20) include additional warnings for overwriting existing files in sparse mode, documentation improvements, an FPE bugfix for reverse copy, really defaulting to -y 0 (not syncing except at the end), not considering EOF an error and displaying better error messages (errno was overwritten in one scenario), portability improvements, and fixes for the output of bad blocks.

Release Notes: This release brings support for fallocate (to tell the filesystem how large the resulting target file will be, so it can avoid fragmentation better). It also enables a progress indicator when the input file size is not known (e.g. a pipe or /dev/zero) but the maximum transfer length has been set with -m.

Release Notes: This release include some fixes (sparse writing, filling 0 when read errors occur) and some better error handling (consider ENOSPC fatal, don't repeat warnings for failed fsyncs). The program now defaults to -y0, meaning no fsyncs. Optionally, dd_rescue can now use the splice system call (on Linux) to do avoid copying of data in memory. The output of the program is now better, allowing the user to see better on what operation (read, write, fsync) warnings or errors occurred. Most importantly, there is a progress bar now, with a completion percentage and an ETA displayed.

Release Notes: The options -b and -y have been added. -b logs the numbers of bad blocks in an ASCII file, suitable for the mke2fs -l option (but beware to match hard block size with mke2fs). The -y option sets the frequency of fsync() on the output file; -y 0 results in the maximum speed.

Release Notes: This release adds proper memalign call to actually make O_DIRECT work.