This allows a posterior analysis of the drive to see if it has any weak zones (areas where the transfer rate drops well below the sustained average). —log-reads=fileLog all read operations in file. If file already exists, it will be overwritten. Read your system documentation to find how to bind a raw device to a regular block device. You need to understand what it does, and you need to understand some things about the machines it does those things to, in order to use it safely. Devices and partitions are accessed by means of their associated file names. The end of the block is its starting position plus its size.
Note that as ddrescue retries the bad-sector blocks, the good data found may divide them into smaller blocks, decreasing the total error size but increasing the number of bad areas. Don’t worry, they have not disappeared; they are simply out of the specified rescue domain. When the global flag noundisp is true, nouns display with a single quote. Defaults to 0. This is not the point from which ddrescue starts copying. (For example, if you pass the ‘—reverse’ option to ddrescue, it starts copying from the end of the rescue domain). In fill mode it refers to a position in the infile of the original rescue run.
The third and fourth passes read the blocks skipped due to slow areas (if any) by the first two passes, in the same direction that each block was skipped. Two files comparing equal with this option are equivalent when used as domain mapfiles. -q—quietQuiet operation. Only non-tried areas are read in large blocks.